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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

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

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
MEDIUM
When does the growth rate of a population following the logistic model equal zero? The logistic model is given as dN/dt=rN1-N/K:
MEDIUM
Assertion (A): In brackish water, stenohaline animals are abundant
Reason (R): Brackish water animals can withstand wide fluctuations in salinity
EASY
Gause's principle of competitive exclusion states that:
HARD
Small mammals and birds are rarely found in polar regions. The reason is that
EASY
Which of the following is correct for r-selected species?
EASY

Observe the following graph of regulators

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In the above graph I, II and III represent

HARD
Which of the following is incorrect pair regarding cyclomorphosis in Daphnia?
EASY
In which of the following interaction both partners are adversely affected?
EASY

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

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MEDIUM
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
Light is an ecological factor that shows its influence on many biological activities like pigmentation, metabolism, etc. Cave dwellers exhibit:
EASY
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
Asymptote is a logistic growth curve is obtained when
EASY
The principle of competitive exclusion was stated by
EASY
In Amphibian and reptiles, the body temperature changes corresponding to external temperature. The organisms which show this kind of response is termed as -
MEDIUM
Most animals are tree dwellers in a: