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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Among the following Indian states, which one has the highest population density?

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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?

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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

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

When does the growth rate of a population following the logistic model equal zero? The logistic model is given as

d N / d t = r N (1 - N / K) :

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

EASY

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

Gause's principle of competitive exclusion states that:

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 of the following is correct for r-selected species?

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 which of the following interaction both partners are adversely affected?

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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

The following graph depicts changes in two populations (A and B) of herbivores in a grassy field. A possible reason for these changes is that.

Question Image

EASY

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:

EASY

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

If '

+

' sign is assigned to beneficial interaction, '

-

' sign to detrimental and '

0

' sign to neutral interaction, then the population interaction represented by '+' '-' refers to

HARD

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

Asymptote is a logistic growth curve is obtained when

EASY

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

The principle of competitive exclusion was stated by

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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:

Among the following Indian states, which one has the highest population density?

Important Questions on Organisms and Populations

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