NEET Botany Organisms And Populations Class 12 Questions

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 mutual relationship as fig wasp completes its life cycle in fig fruit and fig fruit gets pollinated by fig wasp. In the light of the above statements, choose the most appropriate answer from the options given below:

Which one of the following equations represents the Verhulst-Pearl Logistic Growth of population?

The equation of Verhulst-Pearl logistic growth is \( \frac{dN}{dt} = rN \left[ \frac{K⁻N}{K} \right] \). From this equation, \( K \) indicates:

Tropical regions show greatest level of species richness because A. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification. B. Tropical environments are more seasonal. C. More solar energy is available in tropics. D. Constant environments promote niche specialization. E. Tropical environments are constant and predictable. Choose the correct answer from the options given below:

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:

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 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 :

Match List I with List II :

Match List I with List II.

Match List I with List II.

Which one of the following statements cannot be connected to Predation?

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?

In spite of interspecific competition in nature, which mechanism the competing species might have evolved for their survival?

Amensalism can be represented as:

Which of the following statements is not correct?

Match List - I with List - II.

Secondary metabolites such as nicotine, strychnine and caffeine are produced by plants for their:

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

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?

In a growing population of a country,

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

Natality refers to

Mycorrhizae are the example of

Alexander Von Humboldt described for the first time

Asymptote in a logistic growth curve is obtained when

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)

Gause’s principle of competitive exclusion states that

The following graph depicts changes in two populations (X and Y) of herbivores in a grassy field. X possible reason for these changes is that