AIPMT-PRELIMS Botany Organisms and Populations Class 12 Questions

Study the four statements (a–d) given below and select the two correct ones out of them

The figure given below is a schematic representation of response of organisms to abiotic factors. What do a, b and c represent respectively?

Consider the following four statements (1-4) about certain desert animals such as kangaroo-rat. (i) They have dark colour and high rate of reproduction and excrete solid urine (ii) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs (iii) They feed on dry seeds and do not required drinking water (iv) They excrete very concentrated urine and do not use water to regulate body temperature Out of these four,which two are correct-

The table below gives the populations (in thousands) of ten species (A⁻J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows: Which area out of a to d shows maximum species diversity?

Geometric representation of age structure a characteristic of population.

A high density of elephant population in an area can result in

The formula for exponential population growth is:

Niche overlap indicates:

Certain characteristic demographic features of developing countries are -

Two opposite forces operate in the growth and development of every population. One of them relates to the ability to reproduce at a given rate. The force opposing it is called :-

Mycorrhiza is an example of :-

In a population, unrestricted reproductive capacity is called as -

What is true for individuals of same species:

Which type of association is found in between entomophilous flower and pollinating agent:

Two different species can not live for long duration in the same niche or habitat. This law is: