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(a) Prawn
(b) Crab
(c) whale
(d) Fish
Q8 Small openings on the bark of the woody stems used for breathingare called
(a) Lenticels
(b) Root hairs
(c) stomata
(d) Cuticles

Q9 Unicellular organisms respire through -

(a) Lungs
(b) Gills
(c) Cell membrane
(d) skin

Q10 During hibernation, frog takes oxygen through their -
(a) Skin
(b) Air holes
(c) cell membrane
(d) Stomata

SUBJECTIVE
Marks Level
Q1. How do frogs acquire oxygen from their environment? 1 E

Q2. Explain the process of exchange of gases in insects. 1 E

Q3. Describe the process of breathing and respiration in the 3 Av
following animals-

(a) Earthworm (b) Frog (c) Fish

Q4. Describe the process of respiration - 3 Av
(a) In the leaves of plants
(b) In the roots of plants.

Q5. There are three animals X, Y, Z. The animal X can stay in 3 D
water as well as on land and can breathe through its moist
skin as well as through lungs.The animal Y always lives in
water and has gills for breathing. On the other hand, an
animal Z lives in soil and breathes only through its skin.

(a) Identify X, Y and Z.

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