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

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

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.

State True (T) or False (F) for the following statements and select the correct option
a. Mammals from colder climates generally have smaller ears and limbs to minimize the heat loss.
b. Experience of altitude sickness is due to high atmospheric pressure at high altitudes.
c. The size of a population for any species is not a static parameter.
d. Resources for growth for most of the animal population are infinite and become limiting sooner or later.

    a b c d
1. T T T T
2. F T T F
3. F F F F
4. T F T F

behavioural means to cope environmental variations include

1 secretion of solid urine by a kangaroo rat 

2 increase in red blood cell production at high altitude 

3 desert lizard basks in the sunlight when temperature drops below the comfort zone

4 leaves reduced to spines in opuntia 

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

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

Choose the odd one out with respect to structure formed in the different organisms during suspended phase

1. Bacteria, fungi               -  Thick wall spores

2. Higher plants                 -  Seed, vegetative propagules

3. Zooplanktons                 -  Diapause stage

4. Ectothermic organisms    -  Torpid state during favourable season