NEET Biology: Organisms and environment Population interactions Practice Questions
15 free multiple-choice questions on Organisms and environment Population interactions (Ecology and Environment) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. In a predator-prey relationship, if the prey population increases rapidly, what is the immediate effect on the predator population?
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Correct answer: D — Predator population increases
An increase in prey availability generally leads to an increase in the predator population, assuming resources are sufficient.
Q2. In an inter-specific competition scenario, when two different species vie for the same limited resource, the outcome often leads to the exclusion of the weaker competitor. This principle is known as:
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Correct answer: B — Competitive Exclusion Principle
The Competitive Exclusion Principle states that two species competing for the exact same limited resource cannot coexist indefinitely; one will eventually eliminate the other.
Q3. Which term describes the maximum population size of a species that the environment can sustain indefinitely
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Correct answer: A — Carrying capacity
Carrying capacity (K) is the maximum population size that an environment can support indefinitely, considering limited resources.
Q4. Which term describes the environmental capacity of an area to support a given population indefinitely?
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Correct answer: A — Carrying Capacity
Carrying capacity is the maximum population size that an environment can sustain over the long term.
Q5. The relationship where one organism benefits and the other is harmed is termed as
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Correct answer: C — Parasitism
Parasitism is a symbiotic relationship where one organism (the parasite) lives on or in another organism (the host) and derives nutrition at the host's expense.
Q6. The maximum population size that an environment can sustainably support, given the available resources, is known as:
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Correct answer: A — Carrying capacity
Carrying capacity (K) is the maximum population size of a species that the environment can sustain indefinitely.
Q7. In a closed environment with unlimited resources, the growth rate of a population is generally characterized by which type of growth model
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Correct answer: B — Exponential growth
When resources are unlimited, populations tend to grow at an increasing rate, which is described by the exponential growth model.
Q8. Intraspecific competition occurs when:
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Correct answer: A — Two populations compete for the same limited resource
Intraspecific competition is the struggle for limited resources between members of the same species.
Q9. Two species competing for the same limited resources result in which type of population interaction?
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Correct answer: D — Competition
When two or more species vie for the same limited resource (food, space, water), they are engaging in competition.
Q10. Which factor primarily limits the growth of a population in an environment?
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Correct answer: A — Food availability
Carrying capacity, determined by the environment's ability to support the population, is the ultimate limit to growth. Food availability is a key component of this limit.
Q11. Which of the following is an example of an intraspecific interaction
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Correct answer: C — Competition between two individuals of the same species
Intraspecific interaction refers to interactions occurring between members of the same species (e.g., competition within the same species).
Q12. Factors that limit population growth and regulate the size of a population are known as:
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Correct answer: C — Density-dependent factors
Density-dependent factors are those that affect birth and death rates based on the population density, whereas density-independent factors do not.
Q13. Which type of population growth pattern occurs when resources are unlimited and there are no limiting factors present?
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Correct answer: D — Exponential growth
Exponential growth occurs when a population increases at a rate proportional to its current size, assuming unlimited resources, resulting in a J-shaped curve.
Q14. If a population experiences a sudden, drastic decrease in size due to a natural disaster, this change is governed by:
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Correct answer: D — Density-independent factors
Natural disasters are external events that affect the population regardless of its density, making them density-independent factors.
Q15. In a specific habitat, two different species compete for the same limited resources. This type of interaction is termed:
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Correct answer: C — Inter-specific competition
When two different species compete for the same limited resources (like food, space, or water), it is known as inter-specific competition.
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