EARTH’S ATMOSHPHERE

                                                                                                                                                      Proff. R. S. Sengar

1. The body of birds is made light due to:

(a) Absence of muscles

(b) Pneumatic bones

(c) Air sacs

(d) All of the above

Ans. B

2. The organ of flight is Exicoetus is modified:

(a) Pectoral fin    (b) Pelvic fin

(c) Ventral fin     (d) Dorsal fin

Ans. A

3. The Flying amphibian is:

(a) Pteropus      (b) Exocoetus

(c) Rhacophorus  (d) Hyla

 Ans. C

4. Organ of fight in bats is:

(a) Cuticular flaps     (b) Patagia

(c) Feathers     (d) Wings

Ans. B

5. Wings in insects are:

(a) Modification of patagia

(b) Extension of cuticle of the thorax and abdomen

(c) Extension of cuticle of the thorax

(d) Extension of body wall

Ans. C

6. Mostly the desert animals are nocturnal:

(a) They conserve water by avoiding day time heat

(b) They have less competition for food at night

(c) They have less danger of enemies during night

(d) They have only rods in their eyes

Ans. A

7. Short term adaptions are:

(a) Evolutionary importance

(b) Temporary

(b) Of survival value

(d) Bot C and D

Ans. D

8. Any modification in any part of the body that enable the organism to survive and reproduce within the particular environment is:

(a) Speciation (b) Adaption

(c) Aestivation    (d) Variation

Ans. B

9. The animals that lives in caves are:

(a) Cursorial      (b) Cavernicoles

(c) Crepuscular    (d) Fussorial

Ans. B

10. Bones of aquatic animals are spongy and light expect:

(a) Rohu, Catla  

(b) Dolphin, Labeo

(c) Scoliodon, Torpedo

(d) Sea Cow, Walrus

Ans. D

11. Jaws of aquatic animals are:

(a) Having a few number of acrodont teeth

(b) Having a large number of thecodont teeth

(c) Weak & not used for mastication

(d) Strong & used for mastication

Ans. C

12. In aquatic mammals, blubber is present:

(a) In the connective tissue

(b) In the muscles

(c) Around the different organs

(d) In the Skin

Ans. A

13. Skin of aquatic mammals have no hair:

(a) Hair check the loss of heat in the land animals by retaining air around the body, which is not possible in water. It is compensated by the deposition of a layer of fat in the connective tissue beneath the skin

(b) Wetting of hair could have increased the body weight results in it skinning

(c) They are not true mammals

(d) All of the above

Ans. A

14. What relationship persist between birds and cattle:

(a) Mutualism

(b) Protocooperation

(c) Predator

(d) Commensalism

Ans. B

15. Mark the incorrect statement regarding the adaption of E. coli in the intestine of man:

(a) E. coli feed on the undigested food of the host

(b) E. coli reproduces very fast

(c) E. coli respire aerobically

(d) E. coli provide the vitamins to the host

Ans. C

Writer: Professor R. S. Sengar, Director Training and Placement, Sardar Vallabhbhai Patel University of Agriculture and Technology, Modipuram, Meerut.