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

Which of the following is an r-species

(a)

Human

(b)

Insects

(c)

Rhinoceros

(d)

Whale

Match the following and choose the correct combination from the options given below.

Column I	Column II
A. Mutalism	1. Lion and deer
B. Commensalism	2. Round worm and man
C. Parasitism	3. Birds compete with squirrels for nuts
D. Competition	4. Sea anemone on hermit crab
E. Predation	5. Barnacles attached to Whales.

(a)

A- 4, B-5, C-2, D –3, E-1

(b)

A- 3, B-1, C-4, D – 2, E-5

(c)

A- 2, B-3, C-1, D – 5, E-4

(d)

A- 5, B-4, C-2, D – 3, E-1

The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively.

(a)

A	B	C
Conformer	Regulator	Partial Regulator

(b)

A	B	C
Regulator	Partial Regulator	Conformer

(c)

A	B	C
Partial Regulator	Regulator	Conformer

(d)

A	B	C
Regulator	Conformer	Partial Regulator

The relationship between sucker fish and shark is__________

(a)

Competition

(b)

Commensalism

(c)

Predation

(d)

Parasitism.

Which of the following is correct for r-selected species

(a)

Large number of progeny with small size

(b)

large number of progeny with large size

(c)

small number of progeny with small size

(d)

small number of progeny with large size

Animals that can move from fresh water to sea called as______

(a)

Stenothermal

(b)

Eurythermal

(c)

Catadromous

(d)

Anadromous

Some organisms are able to maintain homeostasis by physical means _______

(a)

Conform

(b)

Regulate

(c)

Migrate

(d)

Suspend.