The most primitive vertebrates are:
1. Ostracoderms
2. Cephalochordates
3. Placoderms
4. Cyclostomes
The most primitive vertebrates are:
1. Ostracoderms
2. Cephalochordates
3. Placoderms
4. Cyclostomes
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Change in the number of body parts is called:
1. Continuous variation
2. Discontinuous variation
3. Meristic variation
4. Substantive variation
2. Discontinuous variation
3. Meristic variation
4. Substantive variation
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Which has an additional X-chromosome?
1. Thrner's syndrome
2. Klinefelter's syndrome
3. Super female
4. Down's syndrome
72%
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Branch of zoology dealing with the study of fishes is called:
1. Arthrology
2. Ichthyology
3. Saurology
4. Herpetology
2. Ichthyology
3. Saurology
4. Herpetology
73%
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Theory of continuity of germplasm was propounded by:
1. Mendel
2. Lamarck
3. Weismann
4. Haeckel
67%
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Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?
1. Chorion
2. Allantois
3. Yolk sac
4. Amnion
59%
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The most active phagocytic white blood cells are:
1. Neutrophils and eosinophils
2. Lymphocytes and macrophages
3. Eosinophil and lymphocytes
4. Neutrophils and monocytes
2. Lymphocytes and macrophages
3. Eosinophil and lymphocytes
4. Neutrophils and monocytes
69%
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During the propagation of a nerve impulse, the action potential results from the movement of:
1. K+ ions from extracellular fluid to intracellular fluid
2. Na+ ions from intracellular fluid to extracellular fluid
3. K+ ions from intracellular fluid to extracellular fluid
4. Na+ ions from extracellular fluid to intracellular fluid
58%
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Darwin's finches are an excellent example of:
1. Adaptive radiation
2. Seasonal migration
3. Brood parasitism
4. Connecting links
85%
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