The country with the given population pyramid is likely to have:

1. Low birth rate

2. High declining death rate

3. Declining population in future

4. More females than males

In a tide pool, 15 species of invertebrates were reduced to 8 after one species was removed. The removed species may be a:

1. Parasite                   

2. Mutualist

3. Top predator           

4. Herbivore

The logistic growth curve of animal population growth is more realistic than J shaped curve because:

1. Asexual mode of reproduction is rare in higher animals

2. Resources are finite and become limiting sooner or later.

3. Most animals are conformers rather than regulators

4. Abiotic factors affect animals more than plants

Which of the following is not a function of predators?

When the population density reaches the carrying capacity, the logistic growth curve is said to be in:

1. Lag phase

2. A phase of acceleration

3. A phase of deceleration

4. Asymptote

In general, which of the following is not an adaptation seen in parasites in accordance with their life style?

1. Loss of unnecessary sense organs

2. Presence of adhesive organs

3. Low reproductive capacity

4. Loss of digestive system

No predator can become proficient at acquiring prey because:

Mycorrhizae are the example of

(1) fungistasis                 

(2) amensalism

(3) antibiosis                   

(4) mutualism

If '+' sign is assigned to beneficial interaction, '-' sign to detrimental and '0' sign to neutral interaction, then the population interaction represented by '+' '-' refers to

(1) Mutualism

(2) Amensalism

(3) Commensalism

(4) Parasitism

The principle of competitive exclusion was stated by 

(1) C Darwin

(2) GF Gause

(3) MacArthur

(4) Verhuisd and Pearl