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NCERT Solutions for Class 12 Biology Chapter 2
NCERT Solutions for Class 12 Biology Chapter 2
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SEXUAL REPRODUCTION IN FLOWERING PLANTS 9CHAPTER 2
SEXUAL REPRODUCTION IN
FLOWERING PLANTS
MULTIPLE-CHOICE QUESTIONS
1. Among the terms listed below, those that of are not technically correct
names for a floral whorl are:
i. Androecium
ii. Carpel
iii. Corolla
iv. Sepal
(a) i and iv, (b) iii and iv (c) ii and iv (d) i and ii.
2. Embryo sac is to ovule as _______ is to an anther.
a. Stamen
b. Filament
c. Pollen grain
d. Androecium
3. In a typical complete, bisexual and hypogynous flower the arrangement
of floral whorls on the thalamus from the outermost to the innermost is:
a. Calyx, corolla, androecium and gynoecium
b. Calyx, corolla, gynoecium and androecium
c. Gynoecium, androecium, corolla and calyx
d. Androecium, gynoecium, corolla and calyx
4. A dicotyledonous plant bears flowers but never produces fruits and
seeds. The most probable cause for the above situation is:
a. Plant is dioecious and bears only pistillate flowers
b. Plant is dioecious and bears both pistillate and staminate flowers
c. Plant is monoecious
d. Plant is dioecious and bears only staminate flowers.
, 10 BIOLOGY, EXEMPLAR PROBLEMS
5. The outermost and innermost wall layers of microsporangium in an
anther are respectively:
a. Endothecium and tapetum
b. Epidermis and endodermis
c. Epidermis and middle layer
d. Epidermis and tapetum
6. During microsporogenesis, meiosis occurs in:
a. Endothecium
b. Microspore mother cells
c. Microspore tetrads
d. Pollen grains.
7. From among the sets of terms given below, identify those that are
associated with the gynoecium.
a. Stigma, ovule, embryo sac, placenta
b. Thalamus, pistil, style, ovule
c. Ovule, ovary, embryo sac, tapetum
d. Ovule, stamen, ovary, embryo sac
8. Starting from the innermost part, the correct sequence of parts in an
ovule are,
a. egg, nucellus, embryo sac, integument
b. egg, embryo sac, nucellus, integument
c. embryo sac, nucellus, integument, egg
d. egg, integument, embryo sac, nucellus.
9. From the statements given below choose the option that are true for a
typical female gametophyte of a flowering plant:
i. It is 8-nucleate and 7-celled at maturity
ii. It is free-nuclear during the development
iii. It is situated inside the integument but outside the nucellus
iv. It has an egg apparatus situated at the chalazal end
(a) i and iv, (b) ii and iii (c) i & ii (d) ii & iv
10. Autogamy can occur in a chasmogamous flower if:
a. Pollen matures before maturity of ovule
b. Ovules mature before maturity of pollen
c. Both pollen and ovules mature simultaneously
d. Both anther and stigma are of equal lengths.
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