Organisms and Populations

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt = rN(1 − N/K): (NEET 2016 (Phase 1))

Gause's principle of competitive exclusion states that: (NEET 2016 (Phase 1))

Which of the following is correct for r-selected species? (NEET 2016 (Phase 2))

If '+' sign is assigned to beneficial interaction, '–' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '–' refers to (NEET 2016 (Phase 2))

The principle of competitive exclusion was stated by (NEET 2016 (Phase 2))

Mycorrhizae are the example of

Asymptote in a logistic growth curve is obtained when

Natality refers to

Niche is

Which one of the following population interactions is widely used in medical science for the production of antibiotics? (NEET 2018)

In a growing population of a country,

Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other? (NEET 2018)

Which of the following is not an attribute of a population?

Amensalism can be represented as :

Inspite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival? (NEET 2021)

In the exponential growth equation Nt = N0e^rt, e represents:

Which one of the following statements cannot be connected to Predation? (NEET 2022)

While explaining interspecific interaction of population, (+) sign is assigned for beneficial interaction, (-) sign is assigned for detrimental interaction and (0) for neutral interaction. Which of the following interactions can be assigned (+) for one species and (-) for another species involved in the interaction? (NEET 2022)

If '8' Drosophila in a laboratory population of '80' died during a week, the death rate in the population is __ individuals per Drosophila per week. (NEET 2022)

Match List I with List II: List I (Interaction) A. Mutualism B. Commensalism C. Amensalism D. Parasitism List II (Effect on Species A and B) I. + (A), 0 (B) II. – (A), 0 (B) III. + (A), – (B) IV. + (A), + (B) Choose the correct answer from the options given below: (NEET 2023 (Phase 1))

Given below are two statements: Statement I: Gause's 'Competitive Exclusion Principle' states that two closely related species competing for the same resources cannot co-exist indefinitely and the competitively inferior one will be eliminated eventually. Statement II: In general, carnivores are more adversely affected by competition than herbivores. In the light of the above statements, choose the correct answer from the options given below: (NEET 2023 (Phase 1))

Match List I with List II: List I (Interacting species) A. A Leopard and a Lion in a forest/grassland B. A Cuckoo laying egg in a Crow's nest C. Fungi and root of a higher plant in Mycorrhizae D. A cattle egret and a Cattle in a field List II (Name of Interaction) I. Competition II. Brood parasitism III. Mutualism IV. Commensalism Choose the correct answer from the options given below: (NEET 2023 (Phase 1))

Match List I with List II: List I A. Logistic growth B. Exponential growth C. Expanding age pyramid D. Stable age pyramid List II I. Unlimited resource availability condition II. Limited resource availability condition III. The percent individuals of pre-reproductive age is largest, followed by reproductive and post-reproductive age groups IV. The percent individuals of pre-reproductive and reproductive age groups are same Choose the correct answer from the options given below: (NEET 2023 (Phase 1))

Plants offer rewards to animals in the form of pollen and nectar and the animals facilitate the pollination process. This is an example of : (NEET 2023 (Phase 2))

For chemical defence against herbivores, Calotropis has (NEET 2023 (Phase 2))

If there are 250 snails in a pond, and within a year their number increases to 2500 by reproduction. What should be their birth rate per snail per year? (NEET 2023 (Phase 2))

Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as - (NEET 2023 (Odisha))

Between which among the following, the relationship is not an example of commensalism? (NEET 2023 (Odisha))

Given below are two statements: Statement I: Gause's competitive exclusion principle states that two closely related species competing for different resources cannot exist indefinitely. Statement II: According to Gause's principle, during competition, the inferior will be eliminated. This may be true if resources are limiting. In the light of the above statements, choose the correct answer from the options given below: (NEET 2024)

The equation of Verhulst-Pearl logistic growth is dN/dt = rN[(K-N)/K]. From this equation, K indicates. (NEET 2024)

Epiphytes that are growing on a mango branch is an example of which of the following?

Given below are two statements: Statement I: Fig fruit is a non-vegetarian fruit as it has enclosed fig wasps in it. Statement II: Fig wasp and fig tree exhibit a mutual relationship, as the fig fruit provides the wasp a place to lay eggs and the fig gets pollinated by the fig wasp. In the light of the above statements, choose the most appropriate answer from the options given below: (NEET 2025)

Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population? (NEET 2025)

Assertion A: The logistic growth model of populations is considered more realistic than the exponential growth model. Reason R: Resources are finite. Choose the most appropriate answer:

Consider a population of 10 million cells with a per-capita birth rate of 0.002 (per unit time) and a per-capita death rate of 0.002 (per unit time). The expected number of cells after 10 generations is ______.

Which of the following equations depicts Verhulst-Pearl logistic population growth?

Which one of the following is an appropriate example of sexual deceit?

Choose the correct statements regarding population interactions between two species. A. In both parasitism and commensalism, only one species benefits and the other species is harmed. B. Both species benefit in mutualism. C. Both species benefit in commensalism. D. In parasitism, only one species benefits and the other species is harmed. E. In amensalism, one species is harmed and the other is unaffected. Choose the correct answer from the options given below: (NEET 2026)

Match List-I with List-II: List-I A. Both species are harmed B. One species is harmed and the other is benefited C. Both species are benefited D. One is benefited while the other has no effect List-II I. Predation II. Mutualism III. Competition IV. Commensalism Choose the correct answer from the options given below: