Match List - I with List - II . List - I List - II (a) Allen's Rule (i) Kangaroo rat (b) Physiological adaptation (ii) Desert lizard (c) Behavioural adaptation (iii) Marine fish at depth (d) Biochemical adaptation (iv) Polar seal

( a ) − ( iv ) ; ( b ) − ( i ) ; ( c ) − ( iii ) ; ( d ) − ( ii )

( a ) − ( iv ) ; ( b ) − ( ii ) ; ( c ) − ( iii ) ; ( d ) − ( i )

( a ) − ( iv ) ; ( b ) − ( i ) ; ( c ) − ( ii ) ; ( d ) − ( iii )

( a ) − ( iv ) ; ( b ) − ( iii ) ; ( c ) − ( ii ) ; ( d ) − ( i )

Observe the following graph of regulators In the above graph I, II and III represent

I II III Regulators Conformers Partial regulators

I II III Conformers Regulators Partial regulators

I II III Partial regulators Conformers Regulators

I II III Partial regulators Regulators Conformers

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Important Questions on Organisms and Populations

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Biology>Ecology>Organisms and Populations>Organism and its Environment

Assertion (A): A person goes to high altitude and experiences 'altitude sickness' with symptoms like breathing difficulty and heart palpitations.
Reason (R): Due to low atmospheric pressure at high altitude, the body does not get sufficient oxygen.
In the light of the above statements, choose the correct answer from the options given below.

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Biology>Ecology>Organisms and Populations>Organism and its Environment

Which ONE of the following statements about ecosystem energetics is INCORRECT?

MEDIUM

Biology>Ecology>Organisms and Populations>Organism and its Environment

Match List $- I$ with List $- II$ .

List $- I$		List $- II$
(a)	Allen's Rule	(i)	Kangaroo rat
(b)	Physiological adaptation	(ii)	Desert lizard
(c)	Behavioural adaptation	(iii)	Marine fish at depth
(d)	Biochemical adaptation	(iv)	Polar seal

EASY

Biology>Ecology>Organisms and Populations>Organism and its Environment

Male gametophyte in angiosperms produces :

MEDIUM

Biology>Ecology>Organisms and Populations>Organism and its Environment

Assertion

(A)

: In brackish water, stenohaline animals are abundant
Reason

(R)

: Brackish water animals can withstand wide fluctuations in salinity

HARD

Biology>Ecology>Organisms and Populations>Organism and its Environment

Which one of the following statements is not true?

HARD

Biology>Ecology>Organisms and Populations>Organism and its Environment

Small mammals and birds are rarely found in polar regions. The reason is that

EASY

Biology>Ecology>Organisms and Populations>Organism and its Environment

Which one of the following statements is not true?

EASY

Biology>Ecology>Organisms and Populations>Organism and its Environment

Observe the following graph of regulators

Question Image

In the above graph I, II and III represent

HARD

Biology>Ecology>Organisms and Populations>Organism and its Environment

Which of the following is incorrect pair regarding cyclomorphosis in Daphnia

?

EASY

Biology>Ecology>Organisms and Populations>Organism and its Environment

In Angiosperms, microsporogenesis and megasporogenesis:

EASY

Biology>Ecology>Organisms and Populations>Organism and its Environment

With reference to temperature adaptations, identify $A, B, C$ of the following graph

Question Image

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Biology>Ecology>Organisms and Populations>Organism and its Environment

Which is the most common mechanism of genetic variation in the population of sexually-reproducing organism?

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Biology>Ecology>Organisms and Populations>Organism and its Environment

Light is an ecological factor that shows its influence on many biological activities like pigmentation, metabolism, etc. Cave dwellers exhibit:

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Biology>Ecology>Organisms and Populations>Organism and its Environment

The hilum is a scar on the:

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Biology>Ecology>Organisms and Populations>Organism and its Environment

In the majority of angiosperms:

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Biology>Ecology>Organisms and Populations>Organism and its Environment

The ovule of an angiosperm is technically equivalent to

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Biology>Ecology>Organisms and Populations>Organism and its Environment

In Amphibian and reptiles, the body temperature changes corresponding to external temperature. The organisms which show this kind of response is termed as -

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Biology>Ecology>Organisms and Populations>Organism and its Environment

Animals living in air-water interface

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Biology>Ecology>Organisms and Populations>Organism and its Environment

Most animals are tree dwellers in a:

Praying mantis is a good example of

Important Questions on Organisms and Populations

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