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

EASY

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 -

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 of the following is incorrect pair regarding cyclomorphosis in Daphnia

?

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

HARD

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

What type of ecological pyramid would be obtained with following data?
Secondary consumer : 120 g
Primary consumer : 60 g
Primary producer : 10 g

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

Observe the following graph of regulators

Question Image

In the above graph I, II and III represent

MEDIUM

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

Most animals are tree dwellers in a:

EASY

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

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

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HARD

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.

MEDIUM

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

Which of the following statements is incorrect?

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:

MEDIUM

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

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

EASY

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

Gause's principle of competitive exclusion states that:

MEDIUM

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.

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EASY

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

In which of the following interaction both partners are adversely affected?

EASY

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

Which of the following statements is not correct?

EASY

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

Which of the following ecological pyramids is generally inverted?

What is the population density of Monaco?

Important Questions on Organisms and Populations

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