1. | Most have two pairs of limbs and tail is present in some. |
2. | Alimentary canal, urinary and reproductive tracts open into a common chamber called cloaca which opens to the exterior. |
3. | Respiration is by gills, lungs and through skin. |
4. | The heart is two chambered with one atrium and one ventricle. |
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1. Only I is correct | 2. Only II is correct |
3. Both I and II are correct | 4. Both I and II are incorrect |
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I: | Body is covered by dry and cornified skin, dermal scales or scutes. |
II: | External ear is not present and tympanum represents the ear. |
III: | Scales are shed as skin cast in all members. |
IV: | Fertilization is internal and development is direct. |
1. | Only II is correct | 2. | Only II and IV are correct |
3. | All are correct | 4. | Only I and II are incorrect |
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1. | Crocodile | 2. | Wall lizard |
3. | Turtle | 4. | Tortoise |
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In birds:
a: | the characteristic feature is the presence of feathers. |
b: | forelimbs are modified into wings. |
c: | flight is present in all members. |
d: | hind limbs do not have scales. |
1. Only (a) and (d) are incorrect
2. Only (c) and (d) are correct
3. (a), (b) and (c) are correct
4. Only (a) and (b) are correct
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Birds are not characterized by:
1. a fully ossified endoskeleton
2. pneumatic long bones
3. absence of crop and gizzard in the digestive tract
4. a dry skin without glands except the oil gland
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Consider the given two statements:
I: | Birds have a four chambered heart and are warm blooded. |
II: | Respiration in birds is by lungs that are connected to air sacs. |
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Biological name | Common name | |
1. | Aptenodytes | Penguin |
2. | Pavo | Peacock |
3. | Struthio | Pigeon |
4. | Psittacula | Parrot |
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1. a four chambered heart | 2. a single aortic arch |
3. homeothermy | 4. mammary glands |
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1. Ornithorhynchus | 2. Macropus |
3. Macaca | 4. Balaenoptera |
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