NEET Biology: Organisms and Population — Practice Set 5

Q1. Which of the following interactions is NOT correctly matched?

A. Commensalism - One benefits, other is unaffected
B. Parasitism - Both species benefit
C. Mutualism - Both species benefit
D. Competition - Both species are harmed

Q2. Which of the following is an r-selected species characteristic?

A. Long lifespan
B. Few offspring with high parental care
C. Rapid reproduction and high number of offspring
D. Slow development

Q3. Which of the following statements about invasive species is incorrect?

A. Invasive species can outcompete native species.
B. They always improve ecosystem biodiversity.
C. Invasive species may lack natural predators in their new habitat.
D. They can alter ecosystem structure and function.

Q4. Which of the following statements about food chains is correct?

A. Energy flow in a food chain is unidirectional.
B. All organisms in a food chain occupy the same trophic level.
C. Primary consumers feed on secondary consumers.
D. Producers obtain energy from consumers.

Q5. Which of the following is an incorrect statement about keystone species?

A. Keystone species have a significant impact on ecosystem stability.
B. They are always the most abundant species in an ecosystem.
C. Removing a keystone species can cause ecosystem collapse.
D. Predators and primary producers can both be keystone species.

Q6. In which type of age pyramid does the pre-reproductive population size dominate?

A. Stable
B. Declining
C. Expanding
D. None of the above

Q7. Which of the following statements about biodiversity is correct?

A. Higher biodiversity leads to greater ecosystem stability.
B. Biodiversity is unaffected by habitat destruction.
C. Ecosystems with low biodiversity are more resilient to disturbances.
D. Biodiversity only refers to the number of different species in an ecosystem.

Q8. Which of the following is an example of cryptic coloration?

A. A vulture feeding on dead animals
B. A chameleon changing color to blend with its surroundings
C. A cuckoo laying eggs in a crow’s nest
D. A mosquito feeding on human blood

Q9. What is Gause’s Competitive Exclusion Principle?

A. Two species can coexist indefinitely in the same niche.
B. Two closely related species cannot coexist indefinitely in the same niche.
C. Competition always results in extinction.
D. Herbivory is a type of competition.

Q10. Which of the following interactions is observed between sea anemone and clownfish?

A. Predation
B. Parasitism
C. Commensalism
D. Mutualism

Biology — Organisms and Population

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