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Zoology MCQs for NEET — Practice Questions with Answers

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Hygroscopic skin is seen in.....

A. Kangaroo rat B. Uromatrix C. Spiny tailed lizard D. Camel

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What is true for marine animals ?

A. Because of exosmosis they drink sea water B. As they drink sea water exosmosis occurs C. Because of exosmosis body fluid become hypotonic, so they drink sea water D. None of these

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Explanation

Marine animals live in a hypertonic environment where the salinity of the seawater is higher than that of their body fluids. To counteract the water loss due to exosmosis (movement of water out of their bodies), they drink sea water. This helps them maintain their hydration and osmotic balance.

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Match the column I with column II Column I (1) Astacus

(2) Marine turtle.

(3) Spiny lizard

(4) Uromatrix

Column II (p) Hydrophiic skin

(q) green gland

(r) water storage in intestine

(s) salt glands

(1-q), (2-s), (3-p), (4-r)

(1-s), (2-q), (3-p), (4-r)

(1-s), (2-p), (3-q), (4-r)

(1-p), (2-q), (3-s) (4-r)

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Explanation

Matching the organisms to their respective characteristics:

Astacus (a type of crayfish) is associated with the green gland (q).
Marine turtle has salt glands (s) to excrete excess salt.
Spiny lizard has hydrophilic skin (p) which helps in water absorption.
Uromatrix (a type of lizard) stores water in its intestine (r). Thus, the correct match is: \[(1-q), (2-s), (3-p), (4-r)\]

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All plastids have essentially same structure because

A. They have to perform same function B. They are localized in aerial parts of plants C. All plastids store starch, lipid and proteins D. One type of plastid can be differentiated into another type of plastid depending on cell requirements

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Explanation

All plastids have essentially the same structure because one type of plastid can be differentiated into another type of plastid depending on the cell's requirements. This flexibility allows plant cells to adapt to different metabolic needs and environmental conditions.

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The plasmolysed cells regain turgidity and assume original volume under influence of hypotonic solution. The process is called

A. Plasmolysis B. Deplasmolysis C. Endo osmosis D. Exo osmosis

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An animal cell placed in pure water will

A. Swellup and brust B. Shrink and die C. Shrink and undergo plasmolysis D. Swellup and develop turgidity

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Passage of water across a selectively permeable membrane is

A. Active transport B. Pinocytosis C. Facilitated diffusion D. Osmosis

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Seeds placed in water imbibe the water because of

A. Exosmosis B. Higher Î¨ d_Wd C. Lower Î¨ d_Wd D. Pressure of vacuoles

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In thistle funnel experiment, entry of water into thistle funnel stops after some time automatically due to

A. Diffusion of sugar out of thistle funnel. B. External and internal solutions become isotonic. C. Development of hydrostatic pressure in the thistle funnel. D. Development of hydrostatic pressure in the beaker.

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If a cell gets reduced in size when placed in solution, the solution is (CPMT 1988, AFMC 2009)

A. Hypertonic B. Hypotonic C. Weak D. Saturated

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