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Characteristics of a terrestrial biome are strongly influenced by its

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Important Questions on Organisms and Populations

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Which of the following is incorrect pair regarding cyclomorphosis in Daphnia?
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Animals living in air-water interface
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Observe the following graph of regulators

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In the above graph I, II and III represent

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Small mammals and birds are rarely found in polar regions. The reason is that
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Species that are most effective at colonizing new habitats show:
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Identify the incorrect statement
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Assertion (A): In brackish water, stenohaline animals are abundant
Reason (R): Brackish water animals can withstand wide fluctuations in salinity
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Study the following statements regarding adaptations in freshwater habitat
I. Amoeba has contractile vacuole.
II. Glomerular kidneys in freshwater fishes.
III. Sponges form gemmules.
IV. Neoceratodus forms a gelatinous cocoon.
Among the above, the correct statements are
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Root does not help in the absorption of water in which of the following plant?
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Stratification is more common in which of the following?
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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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Individuals of one kind occupying a particular geographic area at a given time are called
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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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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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Which of the following statements are wrong regarding biodiversity ?
(i) Tropics harbor more species than temperate or polar areas
(ii) Terrestrial biodirersity increases from the equator to the poles
(iii) Patterm of biodiversity should not depend on latitude and species area relationship
(iv) Biodiversity exists not only at the species level but also at the lerels of biological organization
(v) Temperate regions are relatively more constant than that of the tropical regions

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Which of the following statements are correct related to the freshwater ecosystem? The correct statements are ________
(i) Pond is an ideal example to understand the fundamentals of the aquatic ecosystem.
(ii) In deep lakes, light can penetrate more than 200m in depth.
(iii) Deep water lakes contain three distinct zones namely the littoral zone, limnetic zone, profundal zone.
(iv) Littoral zone is the shallow part of the lake closer to the shore.
(v) Limnetic zone is the open water zone away from the shore.
(vi) The rate of photosynthesis is equal to the rate of respiration in the littoral zone.
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Homeothermy in humans is maintained through        
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With reference to temperature adaptations, identify  A,B,C of the following graph

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If rice is cooked in a pressure cooker on the Siachen glacier, at sea beach, and on Deccan plain, which of the following is correct about the time taken for cooking rice?
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Most animals are tree dwellers in a: