BIOLOGY | Study Mode

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Question 11
A
one chromosomes from the male joins another form the female 
B
one gene from the male combines with the other from the female 
C
the male nucleus fuses with the female nucleus 
D
one set of h\chromosome combines with another set form the female 
Explanation.
Correct Option:
B
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Question 13
A
diffusion 
B
transpiration 
C
osmosis 
D
plasmolysis 
Explanation.
Share Answer Diffusion is the movement of molecules or ions form a region of higher concentration to that of lower concentration. (A)

Correct Option:
B
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Question 14
A
root cap 
B
endodermis 
C
xylem 
D
Meristem 
Explanation.
Share Answer Tissue which are capable of cell division are called Meristem. Those responsible for the increase of length of roots and stems are found at the lips and are therefore the region of cell division which is at the apical region (i.e. tips of the roots) (A)

Correct Option:
A
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Question 16
A
medulla oblongata 
B
cerebellum 
C
optic lobe 
D
cerebrum 
Explanation.
Share Answer The cerebellum is concerned with hearing, balance and s\muscular control (C).

Correct Option:
C
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Question 18
A
renal vein 
B
renal artery 
C
hepatic artery 
D
hepatic portal vein 
Explanation.
Share Answer Hepatic portal vein carries digested food form small intestine (D).

Correct Option:
D
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Question 19
A
it is covered by a sheath of leaves 
B
the testa and fruit wall fuse after fertilization 
C
it has both endosperm and cotyledon 
D
the pericarp and seed coat are separate 
Explanation.
Share Answer Maize is really a fruit, because the outer coat covering the grain represents the pericarp of the fruit fused with the testa to the seed (B).

Correct Option:
B
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Question 20
A
Two ova fertilized at the same time by the sperm 
B
One ovum fertilized, divides to give two embryos 
C
Two ova fertilized by one sperm 
D
One ovum fertilized by two sperms 
Explanation.
Share Answer The ovum divides after fertilization (B).

Correct Option:
B
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