NEET Biology: Organisms and Population — Practice Set 16

Q1. Which of the following is an incorrect statement about keystone species?

A. Keystone species have a significant impact on ecosystem stability.
B. Their removal can cause disruptions in the ecosystem.
C. Keystone species are always the most abundant in an ecosystem.
D. Some predators act as keystone species by controlling prey populations.

Q2. Which of the following statements about energy transfer in ecosystems is correct?

A. Energy is recycled within an ecosystem.
B. Only 10% of energy is transferred between trophic levels.
C. Primary consumers have the highest energy availability.
D. Energy transfer between trophic levels is 100% efficient.

Q3. Which of the following statements about ecological succession is correct?

A. Primary succession occurs on previously uninhabited surfaces.
B. Secondary succession does not require soil for plant growth.
C. Pioneer species appear at the climax stage of succession.
D. Succession is a rapid process that completes within a few months.

Q4. Which of the following statements about energy flow in an ecosystem is incorrect?

A. Energy flows in one direction from producers to consumers.
B. Decomposers recycle nutrients but do not transfer energy.
C. Energy transfer between trophic levels is 100% efficient.
D. Producers capture solar energy and convert it into chemical energy.

Q5. Which of the following is a correct statement about ecological resilience?

A. Ecosystem resilience refers to the ability to recover from disturbances.
B. Resilience decreases with higher biodiversity.
C. Resilient ecosystems are always unstable.
D. Ecosystems with low biodiversity are more resilient to changes.

Q6. Which of the following statements about food chains is correct?

A. Energy flow in a food chain is bidirectional.
B. Primary consumers directly feed on producers.
C. Decomposers occupy the second trophic level.
D. Food chains do not involve energy transfer.

Q7. Which of the following is a correct statement about energy flow in ecosystems?

A. Energy flows in a circular manner within an ecosystem.
B. Energy is recycled completely at each trophic level.
C. Only 10% of energy is transferred from one trophic level to the next.
D. Primary consumers have the highest energy availability.

Q8. Which of the following organisms follows an r-selected reproductive strategy?

A. Elephants
B. Humans
C. Rats
D. Whales

Q9. Which of the following is a biotic factor affecting population size?

A. Temperature
B. Predation
C. Water availability
D. Soil pH

Q10. Which statement best describes the logistic growth model?

A. Population growth continues indefinitely
B. Growth rate increases exponentially without limits
C. Growth slows as the population nears carrying capacity
D. Birth rates increase as resources decrease

Biology — Organisms and Population

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Which of the following is an incorrect statement about keystone species?

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