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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 Flowering Plants of Biology.
(1)
A bisexual flower which never opens up in its life span is known as
[1]
Autogamy
[2]
Allogamy
[3]
Homogamy
[4]
Cleistogamy
(2)
In angiosperms embryo sac represents:
[1]
Male gametophyte
[2]
Sporophytes
[3]
Female gametophyte
[4]
None of these
Answer: Female gametophyte
(3)
Fibrous thickenings of hygroscopic nature are found in this part of the anther wall:
[1]
Middle layers
[2]
Epidermis
[3]
Endothecium
[4]
Tapetum
(4)
In the fully organized polygonum type of embryo sac, what is the ratio of haploid, diploid and triploid nuclei?
[1]
6 : 1 : 0
[2]
6 : 0 : 1
[3]
3 : 1 : 3
[4]
3 : 2 : 3
(5)
An organic substance that can withstand environmental extremes and cannot be degraded by any enzyme is
[1]
Lignin
[2]
Cellulose
[3]
Cuticle
[4]
Sporopollenin
(6)
Fertilization in which male gametes are carried through pollen tube is known as
[1]
Porogamy
[2]
Syngamy
[3]
Siphonogamy
[4]
Chalazogamy
(7)
The coconut water and the edible part of coconut are equivalent to
[1]
Mesocarp
[2]
Embryo
[3]
Endosperm
[4]
Endocarp
(8)
Vernalisation stimulates flowering in
[1]
Turmeric
[2]
Carrot
[3]
Elephant yam
[4]
Ginger
(9)
8-nucleate embryosacs are
[1]
monosporic only
[2]
bisporic only
[3]
tetrasporic only
[4]
any of these
(10)
A monocarpic plant is one which
[1]
has only one carpel
[2]
produces only one seed
[3]
flowers and fruits only once in life time and thereafter dies
[4]
none of these
Answer: flowers and fruits only once in life time and thereafter dies
(11)
In nature, cleistogamous flowers are
[1]
wind pollinated
[2]
insect pollinated
[3]
self pollinated
[4]
bird pollinated
(12)
The gynoecium consists of many free pistils in flowers of
[1]
Papaver
[2]
Aloe
[3]
Tomato
[4]
Michelia
(13)
Double fertilization involves
[1]
Fusion of secondary nucleus with one male gamete
[2]
Fusion of secondary nucleus with both male gametes
[3]
Fusion of one polar nucleus with one male gamete
[4]
Any of above, depending on species
Answer: Fusion of secondary nucleus with one male gamete
(14)
Filliform apparatus is found in
[1]
Anther wall
[2]
Synergids
[3]
Egg cell
[4]
Secondary nucleus
(15)
Which one of the following is surrounded by a callose wall?
[1]
Male gamete
[2]
Pollen grain
[3]
Egg
[4]
Microspore mother cell
Answer: Microspore mother cell
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