Population Attributes

The logistic population growth is expressed by the equation

Geometric representation of age structure is a characteristic feature of:

Two opposite forces operate in the growth and development of a population, one of these is ability to reproduce at a given rate. The force opposite to it is called
 

In an open population, intrinsic rate of natural increase (r) is equal to$(\mathrm{N}=\text{ Natality, }\mathrm{M}=\text{ Mortality, }\mathrm{I}=$$\mathrm{Immigration}, \mathrm{E} = \mathrm{Emigration})$

A community comprises of three species. The pyramids below show the distribution of pre-reproductive, reproductive and post-reproductive individuals. If the numerical representation of all the three species in the community is similar, which of the following statements would be true?

I. Species K is a growing population
II. Species L is a growing population
III. Species M is a decreasing population
IV. The community is increasing in population.

The relationship between the home range size and weight of three kinds of mammals is depicted in the graph.

Which of the following shows a lowering of the value of 'r'?

$\frac{\mathrm{dN}}{\mathrm{dt}}=\mathrm{rN}$

The above formula of growth is applicable for

In the above diagram which type of growth have been demonstrated by a curve and
b curve respectively.

After exponential increase, population growth declines and stagnates. The growth curve is

Exponential population growth is represented by

${\mathrm{N}}_{\mathrm{t}+1}={\mathrm{N}}_{\mathrm{t}}+\left(\mathrm{B}+\mathrm{I}\right)-\left(\mathrm{D}+\mathrm{E}\right)$

In the above equation, if that value of D+E is more than B+I then population will-

Above diagram represents age pyramids of human population. In which a, b & c represent triangular, Bell shaped and Urn shaped age pyramid. Which of the following statement is true?

If in a pond there are $40$ Lotus plants last year and through reproduction $16$ new plants are added taking the current population $56$, new the birth will be:-

Select the correct option w.r.t. Age pyramids.

For better survival of human Indian population, which is the most important step?

Asymptote in a logistic growth curve is obtained when :

What type of human population is represented by the following age pyramid

Population of an insect species increases explosively during rainy season and then disappears at the end of the season. It shows

Which is not true for species