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1. |
Most mammalian eggs have practically very little amount of yolk, the survival of their embryos is made possible by the fact that: |
A. |
These are milk-fed |
B. |
These are larger in size |
C. |
These are nourished through placenta |
D. |
They need no food |
Answer: Option C
Explanation:
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2. |
The term development which means formation of body from a single called zygote includes which of the following processes: |
A. |
Increase in cellular number by growth and divisions |
B. |
Differentiation according to division of labour by genetic suppression |
C. |
Arrangement of these parts into tissues, organs etc. |
D. |
All of these |
Answer: Option D
Explanation:
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3. |
Development in frog is: |
A. |
Direct |
B. |
Indirect |
C. |
Both (a) & (b) |
D. |
None of these |
Answer: Option B
Explanation:
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4. |
Eggs in frog are: |
A. |
Microlecithal |
B. |
Mesolecithal |
C. |
Telolecithal |
D. |
Polylecithal |
Answer: Option B
Explanation:
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5. |
Animal pole in frog's egg in water remains upwards because: |
A. |
Sperms enter through it |
B. |
It absorbs light |
C. |
It is free from yolk |
D. |
It makes egg invisible to enermies by absorbing light |
Answer: Option C
Explanation:
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6. |
Animal pole in frog's egg represents perspective: |
A. |
Dorsal side |
B. |
Head end |
C. |
Tail end |
D. |
Ventral side |
Answer: Option B
Explanation:
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7. |
Gray crescent in frog's egg marks the future: |
A. |
Dorsal side of the embryo |
B. |
Ventral side of the embryo |
C. |
Latheral side of the embryo |
D. |
Tail of the embryo |
Answer: Option A
Explanation:
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8. |
The entrance point of sperm in frog's egg marks which of the sides of future embryo: |
A. |
Anterior side |
B. |
Posterior side |
C. |
Dorsal side |
D. |
Ventral side |
Answer: Option A
Explanation:
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9. |
Posterior side of future embryo of frog will be the side: |
A. |
Of entrance point of sperm |
B. |
Opposite to entrance point of sperm |
C. |
Offgray crescent |
D. |
Of animal pole |
Answer: Option B
Explanation:
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10. |
In frog's egg the plane cutting through entrance point, sperm path and median line of gray crescent represents: |
A. |
Sagittal plane of future embryo |
B. |
Anterior end of furture embryo |
C. |
Tail of future embryo |
D. |
None of these |
Answer: Option A
Explanation:
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