Podcast
Questions and Answers
What is the primary function of xylem in plants?
What is the primary function of xylem in plants?
Which of the following is NOT a characteristic of meristematic tissue?
Which of the following is NOT a characteristic of meristematic tissue?
During photosynthesis, what happens to the oxygen produced?
During photosynthesis, what happens to the oxygen produced?
What is the connection between transpiration and cohesion?
What is the connection between transpiration and cohesion?
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How does the plant unit connect to the animal systems unit?
How does the plant unit connect to the animal systems unit?
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Which of the following is a key connection between the plant unit and evolution?
Which of the following is a key connection between the plant unit and evolution?
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What is the role of phloem in plant transport?
What is the role of phloem in plant transport?
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What is the function of the stomata in plant leaves?
What is the function of the stomata in plant leaves?
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A human somatic cell contains how many chromosomes in its nucleus?
A human somatic cell contains how many chromosomes in its nucleus?
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Which of the following processes is responsible for creating gametes?
Which of the following processes is responsible for creating gametes?
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Which of the following bacteria classifications describes the arrangement of bacteria in clumps?
Which of the following bacteria classifications describes the arrangement of bacteria in clumps?
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What is the term for the observable traits or characteristics of an organism?
What is the term for the observable traits or characteristics of an organism?
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What is the defining characteristic of an obligate aerobe?
What is the defining characteristic of an obligate aerobe?
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An individual with two identical alleles for a specific gene is considered:
An individual with two identical alleles for a specific gene is considered:
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Which of the following is NOT a characteristic of autosomal dominant inheritance?
Which of the following is NOT a characteristic of autosomal dominant inheritance?
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Which of the following is NOT a method of bacterial movement?
Which of the following is NOT a method of bacterial movement?
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What is the process called where homologous chromosomes exchange genetic material during meiosis?
What is the process called where homologous chromosomes exchange genetic material during meiosis?
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Which of the following accurately describes a characteristic of Gram-negative bacteria?
Which of the following accurately describes a characteristic of Gram-negative bacteria?
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Which phase of mitosis is characterized by the alignment of chromosomes at the center of the cell?
Which phase of mitosis is characterized by the alignment of chromosomes at the center of the cell?
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Which of the following fungal classifications describes a relationship where both organisms benefit from the interaction?
Which of the following fungal classifications describes a relationship where both organisms benefit from the interaction?
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What is the primary function of the small intestine?
What is the primary function of the small intestine?
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Which of the following is NOT a mechanism of evolution?
Which of the following is NOT a mechanism of evolution?
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Which of the following is considered the functional unit of the respiratory system?
Which of the following is considered the functional unit of the respiratory system?
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What is the most likely effect of the bottleneck effect on a population?
What is the most likely effect of the bottleneck effect on a population?
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What is the function of the left ventricle?
What is the function of the left ventricle?
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Which of the following is a characteristic of a beneficial mutation?
Which of the following is a characteristic of a beneficial mutation?
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Which of the following is NOT a positive interaction between different kingdoms?
Which of the following is NOT a positive interaction between different kingdoms?
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Which of the following statements is TRUE about maternal inheritance?
Which of the following statements is TRUE about maternal inheritance?
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What is the significance of the law of segregation in genetics?
What is the significance of the law of segregation in genetics?
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Which of the following describes the process of sexual reproduction in fungi?
Which of the following describes the process of sexual reproduction in fungi?
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Which of the following is a characteristic of a cladogram?
Which of the following is a characteristic of a cladogram?
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Which of the following is NOT a mechanism that contributes to increasing genetic variation?
Which of the following is NOT a mechanism that contributes to increasing genetic variation?
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Which of the following is NOT a type of bacterial classification?
Which of the following is NOT a type of bacterial classification?
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What is the term for a cross between two individuals who differ in only one trait?
What is the term for a cross between two individuals who differ in only one trait?
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Which of the following is a key component of the theory of evolution?
Which of the following is a key component of the theory of evolution?
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How does genetics contribute to understanding biodiversity?
How does genetics contribute to understanding biodiversity?
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Which of the following is an example of a positive interaction between different kingdoms?
Which of the following is an example of a positive interaction between different kingdoms?
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During which phase of meiosis is the chromosome number reduced from diploid to haploid?
During which phase of meiosis is the chromosome number reduced from diploid to haploid?
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What is the name of the process where the cytoplasm of a cell divides?
What is the name of the process where the cytoplasm of a cell divides?
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Which of the following is an example of a beneficial mutation?
Which of the following is an example of a beneficial mutation?
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Which of the following is an example of a species that is classified as a coccus?
Which of the following is an example of a species that is classified as a coccus?
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Which of the following is NOT a classification used to classify bacteria?
Which of the following is NOT a classification used to classify bacteria?
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What are the three domains of life?
What are the three domains of life?
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Which kingdom is characterized by autotrophic organisms with cell walls made of cellulose?
Which kingdom is characterized by autotrophic organisms with cell walls made of cellulose?
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What is the primary difference in the cell structure between prokaryotes and eukaryotes?
What is the primary difference in the cell structure between prokaryotes and eukaryotes?
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Which of the following statements about biodiversity is true?
Which of the following statements about biodiversity is true?
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Which of the following is NOT a fundamental characteristic used to classify organisms into kingdoms?
Which of the following is NOT a fundamental characteristic used to classify organisms into kingdoms?
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What does binomial nomenclature signify?
What does binomial nomenclature signify?
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Which of the following organisms would belong to the Fungi kingdom?
Which of the following organisms would belong to the Fungi kingdom?
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Which of the following best describes the term 'taxon'?
Which of the following best describes the term 'taxon'?
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What is the definition of homology in the context of evolutionary biology?
What is the definition of homology in the context of evolutionary biology?
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What is an example of vestigial features?
What is an example of vestigial features?
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What distinguishes convergent evolution from divergent evolution?
What distinguishes convergent evolution from divergent evolution?
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Which process describes the formation of a new species due to geographical isolation?
Which process describes the formation of a new species due to geographical isolation?
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Which barrier is characterized by two species that mate at different times?
Which barrier is characterized by two species that mate at different times?
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What is the primary role of antibiotic resistance in bacteria?
What is the primary role of antibiotic resistance in bacteria?
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What evolutionary concept explains why the wings of birds and bats are similar despite differing ancestors?
What evolutionary concept explains why the wings of birds and bats are similar despite differing ancestors?
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Which is an example of a prezygotic reproductive barrier?
Which is an example of a prezygotic reproductive barrier?
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What allows for significant variations in traits within a species, particularly in plants?
What allows for significant variations in traits within a species, particularly in plants?
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Which mechanism of evolution directly involves human influence on breeding?
Which mechanism of evolution directly involves human influence on breeding?
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Which type of isolation occurs when two species occupy different habitats?
Which type of isolation occurs when two species occupy different habitats?
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What supports the concept of common ancestry at the molecular level?
What supports the concept of common ancestry at the molecular level?
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What is hybrid infertility?
What is hybrid infertility?
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Which of the following statements is incorrect regarding homologous structures?
Which of the following statements is incorrect regarding homologous structures?
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What is the primary function of stomata in plants?
What is the primary function of stomata in plants?
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Which tissue type is responsible for transporting water and nutrients in plants?
Which tissue type is responsible for transporting water and nutrients in plants?
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What distinguishes angiosperms from gymnosperms?
What distinguishes angiosperms from gymnosperms?
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Which part of the plant is primarily responsible for photosynthesis?
Which part of the plant is primarily responsible for photosynthesis?
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What is the primary function of root hairs in plants?
What is the primary function of root hairs in plants?
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What characteristic do non-vascular plants lack compared to vascular plants?
What characteristic do non-vascular plants lack compared to vascular plants?
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Which structure on leaves aids in regulating water loss?
Which structure on leaves aids in regulating water loss?
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Which type of root system is characterized by a large, thick main root with smaller lateral roots?
Which type of root system is characterized by a large, thick main root with smaller lateral roots?
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What type of plant is considered a seedless vascular plant?
What type of plant is considered a seedless vascular plant?
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Which structure offers protection to the root as it grows through the soil?
Which structure offers protection to the root as it grows through the soil?
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In which part of a flowering plant would you find ovules?
In which part of a flowering plant would you find ovules?
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What role does the chlorophyll play in plants?
What role does the chlorophyll play in plants?
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What is the function of the phloem in plants?
What is the function of the phloem in plants?
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Which type of plant is characterized by producing seeds that develop within fruits?
Which type of plant is characterized by producing seeds that develop within fruits?
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What is the primary function of the left ventricle in the circulatory system?
What is the primary function of the left ventricle in the circulatory system?
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Which statement about the control of breathing is correct?
Which statement about the control of breathing is correct?
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How does the body regulate blood pressure when it drops too low?
How does the body regulate blood pressure when it drops too low?
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What is the role of chloroplasts in photosynthesis?
What is the role of chloroplasts in photosynthesis?
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What is the significance of the aorta in the circulatory system?
What is the significance of the aorta in the circulatory system?
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What happens during the systemic circuit of the circulatory system?
What happens during the systemic circuit of the circulatory system?
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What initiates the process of thermoregulation when the body overheats?
What initiates the process of thermoregulation when the body overheats?
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Which of the following is true about veins in the circulatory system?
Which of the following is true about veins in the circulatory system?
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How do roots contribute to a plant's water absorption?
How do roots contribute to a plant's water absorption?
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In what way does the respiratory system help maintain blood pH?
In what way does the respiratory system help maintain blood pH?
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What can occur if blood glucose levels drop too low?
What can occur if blood glucose levels drop too low?
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Which structure plays a crucial role in preventing over-expansion of the lungs?
Which structure plays a crucial role in preventing over-expansion of the lungs?
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How does the body respond when it is dehydrated?
How does the body respond when it is dehydrated?
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What is the initial step in the process of photosynthesis?
What is the initial step in the process of photosynthesis?
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What characteristic of capillaries is vital for gas exchange in the body?
What characteristic of capillaries is vital for gas exchange in the body?
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Flashcards
Taxonomy
Taxonomy
The science of classifying organisms into groups based on shared characteristics.
Taxon
Taxon
A category used in classifying living things. There are 8 levels, from general to specific: Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species.
Domain
Domain
The highest and most general level of classification. There are 3 domains: Archaea, Bacteria, and Eukarya.
Kingdom
Kingdom
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Binomial Nomenclature
Binomial Nomenclature
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Eukarya
Eukarya
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Bacteria
Bacteria
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Archaea
Archaea
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Gram Stain
Gram Stain
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Gram-positive bacteria
Gram-positive bacteria
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Gram-negative bacteria
Gram-negative bacteria
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Flagella
Flagella
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Corkscrew Motion
Corkscrew Motion
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Coccus
Coccus
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Bacillus
Bacillus
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Spirochetes
Spirochetes
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Heterotrophic bacteria
Heterotrophic bacteria
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Autotrophic bacteria
Autotrophic bacteria
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Obligate Aerobes
Obligate Aerobes
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Facultative aerobes
Facultative aerobes
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Obligate anaerobes
Obligate anaerobes
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Parasitic fungi
Parasitic fungi
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Mutualistic fungi
Mutualistic fungi
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Cladogram
Cladogram
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What is a phenotype?
What is a phenotype?
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What is a genotype?
What is a genotype?
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What is homozygous?
What is homozygous?
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What is heterozygous?
What is heterozygous?
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What is a pedigree?
What is a pedigree?
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What is a mode of inheritance?
What is a mode of inheritance?
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What is autosomal dominant inheritance?
What is autosomal dominant inheritance?
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What is autosomal recessive inheritance?
What is autosomal recessive inheritance?
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What is X-linked dominant inheritance?
What is X-linked dominant inheritance?
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What is X-linked recessive inheritance?
What is X-linked recessive inheritance?
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What is Y-linked inheritance?
What is Y-linked inheritance?
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What is maternal inheritance?
What is maternal inheritance?
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What is mitosis?
What is mitosis?
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What is meiosis?
What is meiosis?
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What is crossing over?
What is crossing over?
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Vascular tissue
Vascular tissue
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Transpiration
Transpiration
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Transpirational pull
Transpirational pull
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Cohesion
Cohesion
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Adhesion
Adhesion
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Translocation
Translocation
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Meristematic tissue
Meristematic tissue
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Stomata
Stomata
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Homology
Homology
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Analogy
Analogy
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Divergent Evolution
Divergent Evolution
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Convergent Evolution
Convergent Evolution
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Vestigial Features
Vestigial Features
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Biogeography
Biogeography
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Speciation
Speciation
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Prezygotic Reproductive Barriers
Prezygotic Reproductive Barriers
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Postzygotic Reproductive Barriers
Postzygotic Reproductive Barriers
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Allopatric Speciation
Allopatric Speciation
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Sympatric Speciation
Sympatric Speciation
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Ploidy
Ploidy
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Haploid Number
Haploid Number
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Artificial Selection
Artificial Selection
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Antibiotic Resistance
Antibiotic Resistance
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Fossils
Fossils
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Aorta
Aorta
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Left Ventricle
Left Ventricle
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Pulmonary vein
Pulmonary vein
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Pulmonary artery
Pulmonary artery
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Superior Vena Cava
Superior Vena Cava
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Homeostasis
Homeostasis
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Thermoregulation
Thermoregulation
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Blood Glucose Regulation
Blood Glucose Regulation
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Osmoregulation
Osmoregulation
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Blood pH Regulation
Blood pH Regulation
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Blood Pressure Regulation
Blood Pressure Regulation
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Pulmonary Circuit
Pulmonary Circuit
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Systemic Circuit
Systemic Circuit
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Arteries
Arteries
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Veins
Veins
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Xylem
Xylem
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Phloem
Phloem
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Photosynthesis
Photosynthesis
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Chlorophyll
Chlorophyll
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Taproot System
Taproot System
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Fibrous Root System
Fibrous Root System
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Root Hairs
Root Hairs
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Vascular Cylinder
Vascular Cylinder
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Root Cap
Root Cap
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Meristem
Meristem
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Leaf Blade
Leaf Blade
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Petiole
Petiole
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Stomata (plural)
Stomata (plural)
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Study Notes
Biodiversity
- Biodiversity encompasses the variety of life forms (animals, plants, fungi, microorganisms) in a specific area.
- Key threats to biodiversity include: climate change, pollution, habitat loss, overexploitation, and invasive species.
- Taxonomy is the science of classifying organisms.
- The classification system uses 8 levels (Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species).
- More shared levels mean closer related species.
- Domains are Archaea (primitive single-celled organisms without a nucleus), Bacteria (single-celled organisms without a nucleus), and Eukarya (organisms with cells having a nucleus).
- Kingdoms (Animalia, Plantae, Fungi, Protista) are categorized by cell type, structure, nutrition, reproduction, and examples.
- Binomial nomenclature is the two-part naming system used by scientists (e.g., Rosa canina for briar rose).
Prokaryotes
- Prokaryotes (Bacteria and Archaea) lack a nucleus.
- Cell walls differ in composition (peptidoglycan in bacteria, varied in archaea).
- Gram stain distinguishes bacteria based on cell wall structure (Gram-positive stain purple, Gram-negative pink).
- Motion can be passive, by flagella (whip-like structures), archaella (in archaea), corkscrew motion (spirochetes), or gliding on mucus.
- Shapes include coccus (spherical), bacillus (rod-shaped), and spirochete (spiral-shaped).
- Grouping classifications include diplo (pairs), staphylo (clumps), and strepto (strings).
- Nutritional modes include autotrophic (making own food) and heterotrophic (obtaining nutrients).
- Oxygen needs include obligate aerobes (require oxygen), facultative aerobes (can use oxygen or fermentation), and obligate anaerobes (cannot survive in oxygen).
Fungi
- Fungi can be parasitic, predatory, mutualistic, or saprobial (absorbing nutrients from dead matter).
- Reproduction is both sexual (spores survive harsh conditions) and asexual.
- Some fungi reproduce through asexual methods like binary fission.
Interactions Between Kingdoms
- Positive interactions include mutualism (bees pollinating plants), symbiosis (fungi aiding plant nutrient absorption), and nitrogen fixation (bacteria providing nitrogen to plants).
- Negative interactions include parasitism (parasites harming hosts), competition (species vying for resources), and predation (animals consuming others).
Phylogeny and Cladograms
- Phylogeny groups species by evolutionary relationships.
- Cladograms visually represent evolutionary relationships.
Evolution
- Evolution is the idea that species are descendants of earlier, different species.
- Key mechanisms of evolution include natural selection, genetic drift (bottleneck and founder effects), mutation, and gene flow.
- Sexual selection favors traits attractive to mates, even if not beneficial for survival.
- Evidence of evolution comes from comparative anatomy (homology, divergent and convergent evolution, vestigial features), comparative development (embryonic homology), molecular biology (DNA/protein similarities), artificial selection, antibiotic resistance, fossils, and geographic distribution.
- Homologous features originate from a common ancestor (same structure, different functions); analogous features arise independently (different structures, same function).
- Speciation is the formation of new species, with prezygotic (habitat isolation, temporal isolation, behavioral isolation, mechanical isolation, gametic isolation) and postzygotic (zygote mortality, hybrid inviability, hybrid infertility, hybrid breakdown) reproductive barriers.
- Speciation can occur allopatrically (geographic isolation) or sympatrically (within the same geographic area).
Genetics
- Ploidy refers to the number of chromosome sets.
- Somatic cells are diploid (2n); gametes are haploid (n).
- Phenotype is the observable trait; genotype is the genetic makeup (represented by alleles).
- Modes of inheritance include autosomal dominant, recessive, X-linked, Y-linked, and maternal (mitochondrial).
- Mitosis and meiosis are cell division processes with different outcomes.
- Mitosis creates 2 identical diploid daughter cells; meiosis creates 4 different haploid daughter cells.
- The law of segregation states that alleles separate into different gametes; the law of independent assortment states that homologous chromosomes align randomly.
- Genetic variation increases through random fertilization and crossing over.
Anatomy
- The digestive system includes the mouth, esophagus, stomach, small intestine, liver, gallbladder, pancreas, large intestine, rectum, and anus.
- The respiratory system includes the nose, nasal cavity, pharynx, larynx, trachea, bronchi, bronchioles, alveoli, and lungs.
- The circulatory system includes the heart (atria and ventricles), aorta, pulmonary artery, pulmonary veins, vena cava, blood vessels (arteries, veins, capillaries).
- Homeostasis describes the body’s maintenance of a stable internal environment.
- Examples include thermoregulation (temperature), blood glucose regulation, osmoregulation (water balance), blood pH regulation, and blood pressure regulation.
- The circulatory system has two circuits: the pulmonary circuit (heart to lungs to heart) and the systemic circuit (heart to body to heart).
Plants
- Plants use photosynthesis to produce glucose and oxygen.
- Photosynthesis takes place in chloroplasts.
- Photosynthesis needs sunlight, carbon dioxide, and water.
- Plant structures (leaves, roots, stems, flowers) work together for transport, support, and reproduction.
- Major groups of plants include green algae, non-vascular plants, seedless vascular plants, gymnosperms (naked seeds), and angiosperms (flowering plants with enclosed seeds).
- Plant organs include roots (for absorption and anchoring), leaves (for photosynthesis), stems (for support and transport), and flowers (for angiosperm reproduction).
- Plant tissues include dermal (protection), ground (photosynthesis and support), vascular (transport), and meristematic (growth).
- Transpiration is water loss through stomata; translocation is sugar transport through phloem.
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Explore the essential concepts of biodiversity, including the threats it faces and the classification of life forms. Understand the differences between prokaryotes and eukaryotes, and learn about the taxonomy levels that define the diversity of organisms. This quiz will enhance your knowledge of ecological and biological classification.