CBSE Class 12 Biology Reproduction In Flowering Plants Worksheet Set 05

Question: Albuminous seeds store their reserve food mainly in
a) perisperm
b) endosperm
c) cotyledons
d) hypocotyl
Answer: b

Question: The largest cell in an embryo sac is
a) egg
b) central cell
c) synergid
d) antipodal cell
Answer: b

Question: What is the main function of filiform apparatus present at the micropylar part of the ovule?
a) It prevents the entry of more than one pollen tube into the embryo sac
b) It helps in the entry of pollen tube into an antipodal cell
c) It helps the pollen tube to enter the ovule through chalazal end
d) It guides the entry of pollen tube into a synergid and discharge the male gametes
Answer: d

Question: Megaspores are produced from the megaspore mother cells after
a) meiotic division
b) mitotic division
c) formation of a thick wall
d) differentiation
Answer: a

Question: Which of the following floral parts forms pericarp after fertilization ?
a) Nucellus
b) Outer integument
c) Ovary wall
d) Inner integument
Answer: c

Question: Multinucleate condition is present in
a) quiescent centre
b) maize
c) meristematic tissue
d) liquid endosperm of coconut
Answer: d

Question: An advantage of cleistogamy is that
a) it leads to greater genetic diversity
b) seed dispersal is more efficient and wide spread
c) each visit of pollinator brings hundreds of pollen grains
d) seed set is not dependent upon pollinators
Answer: d

Question: In a fertilized ovule, n, 2n and 3n conditions occur respectively in
a) antipodal, egg and endosperm
b) egg, nucellus and endosperm
c) endosperm, nucellus and egg
d) antipodals, synergids and integuments
Answer: b

Question: The total number of nuclei involved in double fertilization in angiosperms are
a) two
b) three
c) four
d) five
Answer: d

Question: While planning for an artificial hybridization programme if the female parent have unisexual flowers, then which of the following steps would not be relevant?
a) Bagging of female flower
b) Dusting of pollen on stigma
c) Emasculation
d) Collection of pollen
Answer: c

Question: For artificial hybridization experiment in bisexual flower, which of the following sequences is correct ?
a) Bagging -> Emasculation -> Cross-pollination -> Rebagging
b) Emasculation -> Bagging -> Cross-pollination -> Rebagging
c) Cross-pollination -> Bagging -> Emasculation -> Rebagging
d) Self-pollination -> Bagging -> Emasculation -> Rebagging
Answer: b

Question: Sequence of development during the formation of embryo sac is
a) Archesporium -> Megaspore -> Megaspore mother cell -> Embryo sac
b) Megasporocyte -> Archesporium -> Megaspore -> Embryo sac
c) Megaspore -> Megaspore mother cell -> Archesporium -> Embryo sac
d) Archesporium -> Megaspore mother cell -> Megaspore -> Embryo sac
Answer: d

Question: In a seed of maize, scutellum is considered as cotyledon because it
a) protects the embryo
b) contains food for the embryo
c) absorbs food materials and supplies them to the embryo
d) converts itself into a monocot leaf
Answer: c

Question: Total number of meiotic division required for forming 100 zygotes / 100 grains of wheat is
a) 100
b) 75
c) 125
d) 50
Answer: c

Assertion/Reason Type Questions

In the following questions, a statement of Assertion is followed by a statement of Reason.
(a) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion.
(b) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion.
(c) If Assertion is true but Reason is false.
(d) If both Assertion and Reason are false.

Question: Assertion : Endosperm is a nutritive tissue and it is triploid.
Reason: Endosperm is formed by fusion of secondary nucleus to second male gamete. It is used by developing embryo.
Answer: a

Question: Assertion : Insects visit flower to gather honey.
Reason : Attraction of flowers prevents the insects from damaging other parts of the plant.
Answer: d 

Question: Which of the following is a mismatched pair?
(a) Microsporangium – Pollen sac
(b) Megasporangium – Ovule
(c) Microsporophyll – Stamen
(d) Megasporophyll – Filament
Answer: d

Question: Match the items given in column-I with their examples given in column-II and choose the correct option given below.

Column-I                              Column-II
(Items)                                 (Examples)
A. Ovary                         I. Groundnut, mustard
B. Ovule                         II. Guava, orange, mango
C. Wall of ovary             III. Pericarp
D. Fleshy fruits              IV. Seed
E. Dry fruits V. Fruit
(a) A – V; B – IV; C – III; D – II; E – I
(b) A – I; B – II; C – III; D – IV; E – V
(c) A – I; B – III; C – II; D – IV; E – V
(d) A – V; B – IV; C – I; D – II; E – III
Answer: a

Question: Match the biotic agent of cross pollination given in column-I with their feature given in column-II and select the correct answer using the codes given below

Column-I                               Column-II
A. Zoophily                       I. Pollination by birds
B. Ornithophily                II. Pollination by insects
C. Entomophily               III. Pollination by bats
D. Chiropterophily           IV. Pollination by animals

(a) A – III; B – II; C – I; D – IV
(b) A – I; B – II; C – III; D – IV
(c) A – IV; B – I; C – II; D – III
(d) A – IV; B – II; C – I; D – III
Answer: c

Question: Match the items given in column-I with those given in column-II and chose the correct option given below.

Column-I                                         Column-II
A. Tapetum                            I. Irregular in shape with abundant food reserve
B. Exine                               II. Acts as nutritive layer
C. Pollenkit                          III. Thick, rigid protective layer
D. Vegetative cell                 IV. Involve in the formation of microspores
E. Sporogenous                   V. Oily and sticky layer, help tissue in pollination.

(a) A – II; B – III; C – V; D – IV; E – I
(b) A – I; B – III; C – II; D – IV; E – V
(c) A – II; B – III; C – I; D – IV; E – V
(d) A – II; B – IV; C – V; D – I; E – III
Answer: a