What is true for individuals of same species?
1. Live in same niche
2. Live in same habitat
3. Interbreeding
4. Live in different habitat

Carnivorous animals - lions and leopards, occupy the same niche but lions predate mostly larger animals and leopards take smaller ones. This mechanism of competition is referred to as:

1. Character displacement

2. Altruism

3. Resource partitioning

4. Competitive exclusion

Select the wrongly matched pair

1. Predator - Herbivore.
2. Brood parasitism - Cuckoo.
3. Commensalism - Barnacles on the whale.
4. Mutualism - Sea anemone on a hermit crab.

Study the population growth curves shown in the above diagram.

Which option is the best for curve (i) and (ii)

Find the odd one out about levels of biological
organization:-
1. Biome 

2. Community

3. Species 

4. Population

Verhulst-Pearl population growth is described by the equation

1. $\frac{dN}{dt}$ = rN

2. N_t = N₀e^rt

3. N_t = N₀+B+l-D-E

4. $\frac{dN}{dt}$ = rN$\left(\frac{K-N}{K}\right)$

Which the following pairs is wrongly matched while remaining three are correct

1. Allen’s rule – Mammals with shorter ears and limbs in colder area

2. Expanding population – High number of individual at pre-reproductive stage

3. Population density increasing – (B + I) < (D + E)

4. Carrying capacity – Logistic growth.

In nature, a given habitat has enough resources to support a maximum possible number, beyond which no further growth is possible. The limit is known as

1. Environmental resistance

2. Intrinsic rate of natural increase

3. Carrying capacity 

4. Exponentially growth

Parasites evolved special adaptations in accordance with their life styles. Choose odd one out with respect to these adaptations.

1. High reproductive capacity

2. Simple life cycle and complex morphological, anatomical features

3. Loss of unnecessary sense organs

4. Loss of digestive system

Natural selection operates at the level of :-

1. Organism

2. Population

3. Community

4. Ecosystem