In mycorrhiza, the fungi help the plant in:
1. Synthesis of high energy carbohydrates
2. Absorption of essential nutrients from the soil
3. Nitrogen fixation
4. Biocontrol of pathogens

The fig tree is pollinated by a:

To get pollinated by a bee, the Mediterranean Orchid, Ophrys, employs:
1. Sexual deceit
2. Pseudo-copulation
3. Reward in the form of nectar
4. Place for laying eggs

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

A feature of ‘r’ strategists would be:

The maximum population size of the species that the environment can sustain indefinitely is called as:

A community of living organisms in conjunction with the nonliving components of their environment, interacting as a system is termed:

The threat of extinction will be highest for:

During logistic growth, the sigmoid curve will level off when:
1. the population stops reproducing
2. the population starts reproducing asexually
3. the population reaches the environmental carrying capacity
4. sigmoid growth curves never levels off

A population with a population pyramid that has an extremely broad base will most likely be: