Ecological niche is:(NCERT Exemplar)

1.	The surface area of the ocean
2.	An ecologically adapted zone
3.	The physical position and functional role of a species within the community
4.	Formed of all plants and animals living at the bottom of a lake

What parameters are used for tiger census in our country’s national parks and sanctuaries?(NCERT Exemplar)

Not all parasitism involves feeding on the body of the host. The exception is:
1. ectoparasitism
2. endoparasitism
3. parasitoids
4. brood parasitism

Population size in any given habitat is also known as _______

Mark the incorrect match

Change in population size equation with prolonged exponential phase can be converted into the logistic growth equation by multiplying it with

1.  $\frac{K}{N}$

2.  $\frac{K-N}{K}$

3.  $\frac{K}{K-N}$

4.  $\frac{1}{N-K}$

Zero growth means:

The given age pyramid represents a:

1. Fast expanding population

2. Slowly expanding population

3. Stable population

4. Declining population

Members of a  population

Select the incorrect match with respect to interspecific interaction

      Species A          Species B            Interaction

1.       +                      +                     Mutualism

2.       +                      -                      Parasitism

3.       +                      +                     Commensalism

4.       +                      -                      Predation