Podcast
Questions and Answers
Which factor does not typically contribute to the loss of biodiversity?
Which factor does not typically contribute to the loss of biodiversity?
- Enhanced genetic variation (correct)
- Habitat loss
- Pollution
- Climate change
Which level of biological classification is the most inclusive (meaning it contains the greatest number of different organisms)?
Which level of biological classification is the most inclusive (meaning it contains the greatest number of different organisms)?
- Species
- Kingdom (correct)
- Family
- Genus
Which of the following is not a primary function of the circulatory system?
Which of the following is not a primary function of the circulatory system?
- Removing waste products from tissues
- Transporting nutrients to cells
- Exchanging gases with the environment
- Producing digestive enzymes (correct)
What is the term for the ability of an organism to maintain a stable internal environment?
What is the term for the ability of an organism to maintain a stable internal environment?
Which domain includes organisms known for thriving in extreme environments, such as hot springs and highly saline waters?
Which domain includes organisms known for thriving in extreme environments, such as hot springs and highly saline waters?
Which of the following best describes the primary function of mitochondria in cells?
Which of the following best describes the primary function of mitochondria in cells?
What is the role of genes in heredity?
What is the role of genes in heredity?
Within the context of ecology, what distinguishes biotic factors from abiotic factors?
Within the context of ecology, what distinguishes biotic factors from abiotic factors?
Which process primarily drives evolutionary change?
Which process primarily drives evolutionary change?
Anabolism is best defined as the process of:
Anabolism is best defined as the process of:
What is the significance of genetic variation within a population?
What is the significance of genetic variation within a population?
Which of the following is the most accurate description of a food web?
Which of the following is the most accurate description of a food web?
What is a mutation?
What is a mutation?
Flashcards
Biodiversity
Biodiversity
The variety of life on Earth, including ecosystems and species.
Threats to biodiversity
Threats to biodiversity
Factors that negatively impact biodiversity, like habitat loss and pollution.
Classification System
Classification System
A hierarchical method of organizing living organisms by shared characteristics.
Organ Systems
Organ Systems
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Homeostasis
Homeostasis
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Cell
Cell
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Metabolism
Metabolism
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Cellular Respiration
Cellular Respiration
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Photosynthesis
Photosynthesis
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DNA
DNA
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Mutation
Mutation
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Ecology
Ecology
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Natural Selection
Natural Selection
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Study Notes
Cell Structure and Function
- Cells are the fundamental units of life, composing all living organisms.
- Cell structure and function vary depending on the organism and cell type.
- Specialized structures enable cells to perform specific tasks. Examples: nerve cells for communication, muscle cells for movement.
Cellular Processes
- Metabolism encompasses all chemical reactions in a cell, divided into catabolism (breaking down) and anabolism (building up).
- Cellular respiration converts glucose into ATP (energy) in mitochondria.
- Photosynthesis utilizes sunlight, water, and carbon dioxide to create glucose and oxygen in chloroplasts (plant cells).
- Cell division (mitosis and meiosis) is essential for reproduction, growth, and repair.
Genetics
- DNA holds the genetic instructions for life's development and function.
- DNA segments (genes) code for proteins.
- Genes are inherited from parents to offspring, influencing traits.
- Mutations are DNA sequence changes, potentially harmful, beneficial, or neutral.
- Genetic variation fuels adaptation and evolution.
Ecology
- Ecology studies interactions between organisms and their environment.
- Ecosystems comprise interacting living (biotic) and nonliving (abiotic) components, such as sunlight, water, temperature, and minerals.
- Food webs illustrate feeding relationships within ecosystems.
Evolution
- Populations evolve over time, driven by natural selection.
- Organisms with advantageous traits (better suited to their environment) are more likely to reproduce, passing on those traits.
- Common ancestry explains similarities between species, visualized in phylogenetic trees.
- Species diversity arises from lineage diversification.
Biodiversity
- Biodiversity encompasses Earth's life variety, from genes to ecosystems.
- High biodiversity enhances ecosystem health and resilience.
- Threats to biodiversity include habitat loss, pollution, climate change, and overexploitation of resources.
Classification
- Organisms are organized into hierarchical groups based on shared characteristics.
- Classification includes domains (Bacteria, Archaea, Eukarya), kingdoms, phyla, classes, orders, families, genera, and species.
- Classification helps understand the diversity of life.
Biological Systems
- Organ systems are groups of organs working together for specific functions.
- Examples include digestive, respiratory, circulatory, and nervous systems.
- Homeostasis maintains a stable internal environment despite external changes.
- Feedback mechanisms regulate homeostasis; disruptions can lead to disease.
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