Vocab exam 3

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Which term refers to the similarity in traits or structures between different species due to shared ancestry?

Homology

What term describes anatomical features in organisms that have lost their original function through evolution?

Vestigial

What is the process by which populations evolve traits that enhance their fitness and survival in specific environments?

Adaptive Evolution

What type of natural selection favors individuals with extreme traits, causing a shift in the population's phenotype toward that extreme?

<p>Directional Selection</p> Signup and view all the answers

What is the term for the random change in allele frequencies in a population over time, often more pronounced in small populations?

<p>Genetic Drift</p> Signup and view all the answers

What is the term for a drastic reduction in population size, often due to a catastrophic event, resulting in reduced genetic diversity?

<p>Genetic Bottleneck</p> Signup and view all the answers

What is the term for the process by which new species arise through the evolution of reproductive isolation between populations?

<p>Speciation</p> Signup and view all the answers

What is the term for the barrier preventing members of two populations from interbreeding and exchanging genes?

<p>Reproductive Isolation</p> Signup and view all the answers

What is the term for the rigid, outer structural layer found in plant, fungal, and bacterial cells, providing support and protection?

<p>Cell Wall</p> Signup and view all the answers

What are the short, hair-like appendages on the surface of some bacterial cells, used for attachment to surfaces and genetic exchange?

<p>Pili</p> Signup and view all the answers

Which term refers to the evolutionary history and relationships among species or groups of organisms?

<p>Phylogeny</p> Signup and view all the answers

What is a graphical representation of the evolutionary relationships and common ancestry among different species or groups of organisms?

<p>Phylogenetic Tree</p> Signup and view all the answers

What is the process of evolution where species change over generations due to genetic variations and natural selection, resulting in the development of new traits and species?

<p>Descent with Modification</p> Signup and view all the answers

What refers to the process by which organisms acquire traits that enhance their survival and reproduction in a specific environment, improving their fitness?

<p>Adaptation</p> Signup and view all the answers

What is the selective breeding of organisms by humans to promote the inheritance of desired traits, leading to the development of domesticated varieties?

<p>Artificial Selection</p> Signup and view all the answers

What does fitness in biology refer to?

<p>Fitness</p> Signup and view all the answers

What is the outdated idea suggesting that traits acquired during an individual's lifetime can be passed on to offspring?

<p>Inheritance of Acquired Characteristics</p> Signup and view all the answers

What does common ancestry indicate?

<p>Common Ancestry</p> Signup and view all the answers

Which term refers to the evolutionary relationships and common ancestry among different species or groups of organisms?

<p>Phylogeny</p> Signup and view all the answers

What is a graphical representation of the evolutionary relationships and common ancestry among different species or groups of organisms?

<p>Phylogenetic Tree</p> Signup and view all the answers

Which term refers to an organism that thrives in extreme environmental conditions, such as high temperatures, high salinity, or extreme acidity or alkalinity?

<p>Extremophile</p> Signup and view all the answers

What is the term for a metabolic process or organism that functions in the absence of oxygen, using alternative electron acceptors for energy production?

<p>Anaerobic</p> Signup and view all the answers

Which term refers to an organism capable of producing its own organic compounds as a source of energy?

<p>Autotroph</p> Signup and view all the answers

What is the term for an organism that obtains organic compounds from other organisms as a source of energy and carbon?

<p>Heterotroph</p> Signup and view all the answers

What are the hair-like, small, numerous projections on the surface of some cells, used for movement or feeding?

<p>Cilia</p> Signup and view all the answers

What are the temporary, finger-like extensions of the cell membrane used by some protists for locomotion and capturing prey?

<p>Pseudopodia</p> Signup and view all the answers

What is the term for a diverse group of eukaryotic microorganisms that do not fit into other plant, animal, or fungal classifications?

<p>Protist</p> Signup and view all the answers

What is a type of protist characterized by its animal-like behavior, often single-celled, and typically heterotrophic?

<p>Protozoan</p> Signup and view all the answers

What are photosynthetic, aquatic, and often multicellular organisms belonging to various taxonomic groups?

<p>Algae</p> Signup and view all the answers

What is the underground part of a plant that anchors it, absorbs water and nutrients, and stores energy?

<p>Root</p> Signup and view all the answers

Which plant tissue is responsible for transporting sugars and organic nutrients from photosynthetic tissues to the rest of the plant?

<p>Phloem</p> Signup and view all the answers

What is a reproductive structure that can develop into a new individual without fertilization, often produced by fungi, plants, and some protists?

<p>Spore</p> Signup and view all the answers

What is a mature plant embryo enclosed in a protective coat, often containing a food supply for germination?

<p>Seed</p> Signup and view all the answers

What is the reproductive structure of angiosperms, typically composed of petals, sepals, stamens, and carpels?

<p>Flower</p> Signup and view all the answers

What is a non-vascular plant group, including mosses, liverworts, and hornworts, characterized by a lack of true roots, stems, and leaves?

<p>Bryophyte</p> Signup and view all the answers

What is a type of bryophyte, non-vascular, typically forming dense, green mats in moist habitats?

<p>Moss</p> Signup and view all the answers

What is a group of vascular plants known for their fronds and spore reproduction, characterized by a lack of seeds?

<p>Fern</p> Signup and view all the answers

What is a group of seed-producing, vascular plants with 'naked' seeds not enclosed in fruits, including conifers and cycads?

<p>Gymnosperm</p> Signup and view all the answers

What is the largest group of vascular plants, characterized by flowers and seeds enclosed within fruits?

<p>Angiosperm</p> Signup and view all the answers

What are thread-like filaments that make up the body of multicellular fungi?

<p>Hyphae</p> Signup and view all the answers

Which cell in cnidarians contains a stinging structure called a nematocyst?

<p>Cnidocyte</p> Signup and view all the answers

What is the free-swimming, bell-shaped form of some cnidarians called?

<p>Medusa</p> Signup and view all the answers

What is the sessile, tubular form of some cnidarians called?

<p>Polyp</p> Signup and view all the answers

Which anatomical feature is used for locomotion in mollusks?

<p>Foot</p> Signup and view all the answers

What is the function of the mantle in mollusks?

<p>Secreting the shell</p> Signup and view all the answers

Which group of organisms has a hydraulic system called the water-vascular system?

<p>Echinoderms</p> Signup and view all the answers

What is the flexible, rod-like structure found in chordates during some stage of development?

<p>Notochord</p> Signup and view all the answers

Which connective tissue is flexible and strong, providing support and flexibility in some vertebrates?

<p>Cartilage</p> Signup and view all the answers

Study Notes

Evolution and Natural Selection

  • Homologous structures are similar traits or structures between different species due to shared ancestry.
  • Vestigial structures are anatomical features in organisms that have lost their original function through evolution.
  • Adaptation is the process by which populations evolve traits that enhance their fitness and survival in specific environments.
  • Directional selection favors individuals with extreme traits, causing a shift in the population's phenotype toward that extreme.
  • Genetic drift is the random change in allele frequencies in a population over time, often more pronounced in small populations.
  • Bottleneck effect is a drastic reduction in population size, often due to a catastrophic event, resulting in reduced genetic diversity.

Species and Speciation

  • Speciation is the process by which new species arise through the evolution of reproductive isolation between populations.
  • Reproductive barrier is the barrier preventing members of two populations from interbreeding and exchanging genes.
  • Phylogeny refers to the evolutionary history and relationships among species or groups of organisms.
  • Phylogenetic tree is a graphical representation of the evolutionary relationships and common ancestry among different species or groups of organisms.

Cells and Microorganisms

  • Cell wall is the rigid, outer structural layer found in plant, fungal, and bacterial cells, providing support and protection.
  • Pili are short, hair-like appendages on the surface of some bacterial cells, used for attachment to surfaces and genetic exchange.
  • Extremophile is an organism that thrives in extreme environmental conditions, such as high temperatures, high salinity, or extreme acidity or alkalinity.
  • Anaerobic respiration is a metabolic process or organism that functions in the absence of oxygen, using alternative electron acceptors for energy production.
  • Autotroph is an organism capable of producing its own organic compounds as a source of energy.
  • Heterotroph is an organism that obtains organic compounds from other organisms as a source of energy and carbon.

Plant and Protist Biology

  • Cilia are hair-like, small, numerous projections on the surface of some cells, used for movement or feeding.
  • Pseudopodia are temporary, finger-like extensions of the cell membrane used by some protists for locomotion and capturing prey.
  • Protist is a diverse group of eukaryotic microorganisms that do not fit into other plant, animal, or fungal classifications.
  • Zooflagellate is a type of protist characterized by its animal-like behavior, often single-celled, and typically heterotrophic.
  • Algae are photosynthetic, aquatic, and often multicellular organisms belonging to various taxonomic groups.
  • Root is the underground part of a plant that anchors it, absorbs water and nutrients, and stores energy.
  • Phloem is a plant tissue responsible for transporting sugars and organic nutrients from photosynthetic tissues to the rest of the plant.

Reproduction and Development

  • Spore is a reproductive structure that can develop into a new individual without fertilization, often produced by fungi, plants, and some protists.
  • Seed is a mature plant embryo enclosed in a protective coat, often containing a food supply for germination.
  • Flower is the reproductive structure of angiosperms, typically composed of petals, sepals, stamens, and carpels.
  • Bryophyte is a non-vascular plant group, including mosses, liverworts, and hornworts, characterized by a lack of true roots, stems, and leaves.
  • Moss is a type of bryophyte, non-vascular, typically forming dense, green mats in moist habitats.

Fungi and Animals

  • Hyphae are thread-like filaments that make up the body of multicellular fungi.
  • Cnidoblast is a cell in cnidarians that contains a stinging structure called a nematocyst.
  • Medusa is the free-swimming, bell-shaped form of some cnidarians.
  • Polyp is the sessile, tubular form of some cnidarians.
  • Foot is the anatomical feature used for locomotion in mollusks.
  • Mantle is a layer of tissue in mollusks that secretes the shell and provides protection.

Chordates and Vertebrates

  • Echinoderms are a group of organisms that have a hydraulic system called the water-vascular system.
  • Notochord is the flexible, rod-like structure found in chordates during some stage of development.
  • Cartilage is a type of connective tissue that is flexible and strong, providing support and flexibility in some vertebrates.

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