Which process best describes natural selection?
Natural selection is a mechanism by which individuals with favorable traits are more likely to survive and reproduce.
What is an ecosystem?
An ecosystem includes all living organisms and non-living elements that interact in a particular environment.
Which of the following contributes directly to evolution?
Genetic variation passed through generations is essential for evolutionary changes.
Which best describes mutualism?
Mutualism is a symbiotic relationship where both species benefit.
Which factor would most directly limit population growth in a closed ecosystem?
Resources like food, water, and space are limiting factors in closed ecosystems.
What is a keystone species?
Keystone species have a disproportionately large impact on their ecosystem relative to their abundance.
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Which of the following is a primary producer?
Primary producers are organisms that produce energy-rich organic compounds through photosynthesis.
How is energy transferred in a food web?
Energy flows from producers to consumers, decreasing at each level.
Which evidence supports the theory of evolution?
Fossil records, homologous structures, and molecular similarities provide evidence for evolution.