When predator keeps on eating the prey, then in the end there should be no more prey to be eaten by predator. But this situation is not observed in the case of predation in nature. Because

1. Predators are prudent enough
2. Prey has developed defense mechanism not to allow predators to overexploit them
3. Plants have developed behavioural and chemical defenses.
4. Both A and B

Monarch Butterfly

1. Biochemical defense mechanism
2. Acquires it during it's caterpillar stage by feeding on poisonous weed
3. Highly distasteful to predator Zebra
4. Both A and B

How many insects are phytophagous? And such interaction is called as

1. 30%, parasitism
2. 25% predation
3. 33% commensalism
4. 40% amansalism

Acacia and Cactus show which kind of defences?

1. Biochemical
2. Biomolecular
3. Morphological
4. Behavioural

Calotropis doesn't allow any cows and goats to browse around by releasing

1. Cardiac glucosamine
2. Cardiac glucoside
3. Cardiac glycoside
4. Cardiac nitroside

Which of the following is not produced plants as a product of defense mechanism?

1. Nicotine, quinine
2. Caffeine
3. Strychnine
4. Tumrine

Darwin was convinced enough for considering………. A potential force in organic evolution.

1. Interspecific competition
2. Intraspecific competition
3. Mutualism
4. Predation

Competition occurs when closely related species compete for the same resources that are limiting.

In this statement two concepts are emphasized, one is closely related species and other the resources are limiting.

1. First concept is entirely wrong while second concept is entirely correct.
2. First concept is right while second is partially correct
3. Both are not entirely correct
4. Both are entirely correct.

In some shallow South American lakes visiting Flamingoes and Resident Fishes show which kind of interaction?

1. Competition
2. Predation
3. Parasitism
4. Commensalism

The feeding efficiency of one species might be reduced due to the inhibitory presence of another species with abundant food and space. What does it imply?

1. For competition to occur, resources need not to be limited
2. Interference competition
3. They are competing over same food
4. Both A and B