Understanding Elephants and Ecosystems

What is tusklessness in elephants?

• A genetic mutation that causes elephants to be born without tusks.

• A disease that affects the growth of tusks in elephants.

• A behavioral trait where elephants choose not to use their tusks.

• A result of elephants losing their tusks due to old age.

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Which of the following best describes poaching?

• Legal hunting of animals for sport.

• Illegal hunting of protected animals.

• Capturing animals for zoos.

• Breeding animals in captivity.

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Explain how selective pressure can lead to tusklessness in elephants.

• Selective pressure causes elephants to grow larger tusks.

• Selective pressure from poaching leads to more tuskless elephants surviving and reproducing.

• Selective pressure has no effect on elephant tusks.

• Selective pressure encourages elephants to migrate to safer areas.

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What is the role of natural selection in evolution?

• It causes all individuals to have the same traits.

• It allows individuals with advantageous traits to survive and reproduce at higher rates.

• It eliminates all genetic mutations.

• It ensures that only the strongest individuals survive.

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Identify a limiting factor that could affect the population of elephants.

• Abundant food supply.

• High birth rates.

• Water scarcity.

• Large habitat area.

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How does an organism's niche affect its survival in an ecosystem?

• It determines the organism's lifespan.

• It defines the organism's role and how it interacts with other species.

• It limits the organism's ability to reproduce.

• It has no impact on the organism's survival.

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What is the purpose of gel electrophoresis in DNA analysis?

• To amplify DNA sequences.

• To separate and analyze DNA fragments by size.

• To sequence the entire genome.

• To clone DNA fragments.

Write the chemical equation for photosynthesis.

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Describe the process of cellular respiration.

• It converts light energy into chemical energy.

• It releases energy by breaking down glucose in the presence of oxygen.

• It stores energy in the form of glucose.

• It produces oxygen as a byproduct.

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How does the process of mitosis contribute to growth and repair in organisms?

• Mitosis reduces the number of chromosomes in cells.

• Mitosis creates genetic diversity in offspring.

• Mitosis produces identical cells for growth and repair.

• Mitosis eliminates damaged cells without replacement.

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