NCERT - Reproduction in Organisms Questions and Answers of Class 12 Biology | GkSeries

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Questions
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

Answer: stock
62 ______ is the simplest method of asexual reproduction in unicellular organisms
1 Budding
2 Fragmentation
3 Spore formation
4 Binary fission

Answer: Binary fission
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63 In human cells, there are ______ chromosomes.
1 23
2 32
3 46
4 64

Answer: 46
64 The menstrual cycle in human female is repeated about every ______ days.
1 14
2 21
3 28
4 270

Answer: 28
65 What is formed after fertilization?
1 A sperm
2 An ovum
3 A zygote
4 A gamete

Answer: A zygote
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

Answer: 2-3o C lower
67 How many chromosomes are present in the gamate of human male?
1 46
2 23
3 1
4 22

Answer: 23
68 Which of the following plants shows vegetative propagation?
1 Bryophyllum
2 Sunflower
3 Jute
4 Wheat

Answer: Bryophyllum
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

Answer: clones
70 In this method Parents cell divides into many daughter cells.
1 Budding
2 Multiple fission
3 Binary fission
4 Fission

Answer: Multiple fission
71 Propagules used to raise
1 growth
2 new plants
3 old plants
4 all the above.

Answer: new plants
72 In algae -----is the medium for gamete Transfer.
1 air
2 anther
3 water
4 tentacles

Answer: water
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.

Answer: Both 1 and 2
74 -------is for increase the number of cells.
1 Cell enlargement
2 Cell division
3 Cell differentiation
4 Zygote

Answer: Cell division
75 If the gametes are similar in their appearance they are called as
1 anisogametes
2 isogametes
3 Homogametes
4 Both 3 and 2

Answer: Both 3 and 2

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