All populations in a given physical area are defined as

(a)

Biome

(b)

Ecosystem

(c)

Territory

(d)

Biotic factors

Organisms which can survive a wide range of temperatuer are called

(a)

Ectotherms

(b)

Eurytherms

(c)

Endotherms

(d)

Stenotherms

The interaction in nature, where one gets benefit on the expense of other is...

(a)

Predation

(b)

Mutualism

(c)

Amensalism

(d)

Commensalism

Predation and parasitism are which type of interactions?

(a)

(+,+)

(b)

(+, O)

(c)

(--, --)

(d)

(+, --)

Competition between species leads to

(a)

Extinction

(b)

Mutation

(c)

Amensalism

(d)

Symbiosis