NEET Biology: Organisms and Population — Practice Set 25

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

A. Mutualism benefits both species involved.
B. Parasitism benefits one species while harming the other.
C. Commensalism benefits one species without affecting the other.
D. Competition always benefits both species.

Q2. Which of the following is a characteristic of an organism following an r-selected reproductive strategy?

A. Long lifespan
B. Few offspring with high parental care
C. Rapid reproduction with minimal parental care
D. Slow development and stable population size

Q3. Which of the following best describes an ecosystem's resilience?

A. The number of species in the ecosystem
B. The ability of an ecosystem to recover from disturbances
C. The stability of predator-prey relationships
D. The ability of an ecosystem to support only K-selected species

Q4. In a logistic growth curve, what happens as population size (N) approaches carrying capacity (K)?

A. Population growth increases exponentially
B. Population growth slows down
C. Death rate decreases to zero
D. Natality rate increases

Q5. Which of the following species interactions is beneficial to both species involved?

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

Q6. Which of the following statements about invasive species is true?

A. They always increase biodiversity
B. They can outcompete native species and disrupt ecosystems
C. They are always beneficial to the ecosystem
D. They are only found in aquatic environments

Q7. Which of the following is a fundamental concept of population ecology?

A. Only abiotic factors influence populations
B. Populations remain constant over time
C. Populations interact with biotic and abiotic factors
D. Individuals adapt to environmental changes, but populations do not

Q8. Which of the following is a density-independent factor affecting population size?

A. Food availability
B. Predation pressure
C. Natural disasters
D. Disease

Q9. Which of the following describes an invasive species?

A. A species that is native to an ecosystem
B. A species introduced to a new habitat that spreads uncontrollably
C. A species that only grows in controlled environments
D. A species that has co-evolved with its habitat

Q10. Which of the following statements about species interactions is correct?

A. Mutualism benefits both interacting species.
B. Commensalism always harms one species.
C. Parasitism benefits both species equally.
D. Competition results in increased resources for both species.

Biology — Organisms and Population

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