Download PDF
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 Flowering Plants of Biology.
61
In Angiosperms pollen tube liberate their male gametes into the:
[1]
Egg cell
[2]
Antipodal cells
[3]
Central cell
[4]
Synergids
62
The Pollengrain is related to the embryo sac as:
[1]
Male gametophyte is to the egg
[2]
Sperm is to egg
[3]
Male gametophyte is to Female gametophyte
[4]
All of these
Answer: Male gametophyte is to Female gametophyte
63
Grafting is successful in dicots but not in monocots because the dicots have:
[1]
cork cambium
[2]
vascular bundles arranged in a ring
[3]
vessels with elements arranged end to end
[4]
cambium for secondary growth
Answer: cambium for secondary growth
64
If any somatic cell of sporophyte produces gametophyte without reduction division, it is
[1]
Parthenogenesis
[2]
Amphimixis
[3]
Apospory
[4]
Apogamy
65
Juvenile phase fail to flower because:
[1]
It is too strong
[2]
It does not respond to stimuli.
[3]
It is too weak
[4]
It is too weak
Answer: It does not respond to stimuli.
66
Wind pollination is common in
[1]
Orchids
[2]
Legumes
[3]
Lilies
[4]
Grasses
67
Tapetum layer around the pollen sac is meant for :
[1]
Dehiscene
[2]
Protection
[3]
Fusion
[4]
Nutrition
68
When the other floral parts are arranged at the base of the gynoecium, the flower is called :
[1]
Perigynous flower
[2]
Epigynous flower
[3]
Hypogynous flower
[4]
None of these
Answer: Hypogynous flower
69
In which one pair both the plants can be vegetatively propagated by leaf pieces
[1]
Asparagus and Bryophyllum
[2]
Bryophyllum and Kalanchoe
[3]
Chrysanthemum and Agave
[4]
Agave and Kalanchoe
Answer: Agave and Kalanchoe
70
An orthotropous ovule is one in which micropyle and chalaza are
[1]
parallel along with funicle
[2]
at right angles to funicle
[3]
parallel along with ovule
[4]
in straight line of funicle
Answer: in straight line of funicle
71
Nucellar polyembryony is reported in species of
[1]
Brassica
[2]
Citrus
[3]
Gossypium
[4]
Triticum
72
In Agave, vegetative propagation is carried out through
[1]
Rhizome
[2]
Stolon
[3]
Bulbils
[4]
Sucker
73
In which one of the following pollination is autogamous?
[1]
Cleistogamy
[2]
Geitonogamy
[3]
Xenogamy
[4]
Chasmogamy
74
Filiform apparatus is a characteristic feature of
[1]
Zygote
[2]
Suspensor
[3]
Egg
[4]
Synergid
75
In a mature ovule,if helium is close to micropyle, then the ovule is called:
[1]
Orthotropous
[2]
Anatropous
[3]
Campylotropous
[4]
Hemitropous
Take Mock Tests
Chapters