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Free Download as PDF of the detailed solutions for class 12 Biology from NCERT or CBSE text book as per exam pattern, to help you in day to day learning. We provide all important questions and answers from chapter Reproduction in Organisms of Biology.
61
The cut part of a plant stem (having roots and is fixed to the ground) used in the process of grafting is...
[1]
scion
[2]
cutting
[3]
bud
[4]
stock
62
______ is the simplest method of asexual reproduction in unicellular organisms
[1]
Budding
[2]
Fragmentation
[3]
Spore formation
[4]
Binary fission
63
In human cells, there are ______ chromosomes.
[1]
23
[2]
32
[3]
46
[4]
64
64
The menstrual cycle in human female is repeated about every ______ days.
[1]
14
[2]
21
[3]
28
[4]
270
65
What is formed after fertilization?
[1]
A sperm
[2]
An ovum
[3]
A zygote
[4]
A gamete
66
The temperature in the scrotum is about ______ than the body temperature.
[1]
2-3o C higher
[2]
5-6o C higher
[3]
2-3o C lower
[4]
5-6o C lower
67
How many chromosomes are present in the gamate of human male?
[1]
46
[2]
23
[3]
1
[4]
22
68
Which of the following plants shows vegetative propagation?
[1]
Bryophyllum
[2]
Sunflower
[3]
Jute
[4]
Wheat
69
In asexual reproduction, two off-springs having the same genetic material and same body features are called...
[1]
callus
[2]
twins
[3]
clones
[4]
chromosomes
70
In this method Parents cell divides into many daughter cells.
[1]
Budding
[2]
Multiple fission
[3]
Binary fission
[4]
Fission
71
Propagules used to raise
[1]
growth
[2]
new plants
[3]
old plants
[4]
all the above.
72
In algae -----is the medium for gamete Transfer.
[1]
air
[2]
anther
[3]
water
[4]
tentacles
73
Development of zygote depends on?
[1]
Life cycle of the organism
[2]
Environment it is exposed to
[3]
Both 1 and 2
[4]
None of the above.
74
-------is for increase the number of cells.
[1]
Cell enlargement
[2]
Cell division
[3]
Cell differentiation
[4]
Zygote
75
If the gametes are similar in their appearance they are called as
[1]
anisogametes
[2]
isogametes
[3]
Homogametes
[4]
Both 3 and 2
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