Organisms and Populations PYQ — Page 4

For a critical study of secondary growth in plants, which one of the following pairs is suitable?

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

Geometric representation of age structure is a characteristic of:

Tho population of an insect species shows an explosive increase in numbers during rainy season followed by its disappearance at the end of the season. What does this show?

Which one of the following ecosystem types has the highest annual net primary productivity?

In the mean and the median pertaining to a certain character of a population arc of the same value, the following is most likely to occur:

The formula for exponential population growth is:

Niche overlap indicates:

Praying mantis is a good example of:

People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million. This is because at high altitude:

There exists a close association between the alga and the fungus within a lichen. The fungus:

Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example.

Certain characteristic demographic features of developing countries are:

What is a keystone species?

Lichens are well known combination of an alga and a fungus where fungus has:

Phenetic classification of organisms is based on:

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:

Escherichia coli is used as an indicator organism to determine pollution of water with:

Mycorrhiza is an example of:

Choose the correct sequence of stages of the growth curve bacteria.

Significance of mimicry is:

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

The semilog of per minute growing bacteria is plotted against time. What will be the shape of the graph?

Which of the following is important for speciation?