NCERT Class11 Biology Reproductio MCQs,CBSE Botany,Zoology PDFs

Sexual Reproduction in Flowering Plants Mock Test-10

Question No:1

Pollen pistil interaction refers to

(A) Pistil’s ability to recognize the pollen
(B) Acceptance of pollen to promote post-pollination events
(C) Both are incorrect
(D) Both (a) and (b) are correct



Question No:2

The acceptance and rejection by continuous dialogue between pollen grain and pistil mediated by chemical components of pollen and pistil result in

(A) Autogamy
(B) Pollen pistil interaction
(C) Geitonogamy
(D) Pollination



Question No:3

During pollen pistil interaction chemical components are released from

(A) Only pollen
(B) Only pistil
(C) Both pollen and pistil
(D) The ovary



Question No:4

What happens when the pollen falls on the stigma?

(A) Pollination
(B) Reject of pollen
(C) Only the compatible pollen germinates
(D) Autogamy



Question No:5

The pore from which the pollen tube germinates

(A) Seed pore
(B) Germ pore
(C) Intine
(D) Exine



Question No:6

Which way of pollen to ovary is sequentially correct?

(A) Ovary -> Style -> Stigma
(B) Style -> Stigma —> Ovary
(C) Stigma -> Ovary —>Style
(D) Stigma —> Style —> Ovary



Question No:7

What indicates ‘A’ in above figure?

(A) Cotyledon
(B) Hypocotyl root axis
(C) Seed coat
(D) Endosperm



Question No:8

What indicates ‘C’ in above figure?

(A) Shoot apical meristem
(B) Root tip
(C) Cotyledon
(D) Seed coat



Question No:9

What indicates ‘F’ in above figure?

(A) Root tip
(B) Shoot apical meristem
(C) Cotyledon
(D) Endosperm



Question No:10

What indicates ‘D’ in above figure?

(A) Seed coat
(B) Cotyledon
(C) Shoot apical meristem
(D) Hypocotyl root axis



Question No:11

During pollination in plants which shed pollens in 2-celled stage, the cells are called as

(A) Two vegetative cell
(B) Two generative cell
(C) Both are correct
(D) One vegetative and one generative cell



Question No:12

Generative cell in pollen tube divides and forms

(A) One male gamete
(B) Two male gamete
(C) Three male gamete
(D) Four male gamete



Question No:13

The plants in which pollen are shed in 3-celIed stage contain?

(A) Two male gametes only
(B) A large vegetative cell only
(C) Both (a) and (b)
(D) None of these



Question No:14

What indicates ‘A’ in the following figure?

(A) Micropyle
(B) Cotyledon
(C) Endosperm
(D) Scutellum



Question No:15

The pollen tube after reaching the ovary enters inside the ovule generally through which part of ovule?

(A) Chalazal end
(B) Micropyle end
(C) Any of them
(D) Integument of ovule



Question No:16

The pollen enters one of the synergids through

(A) Micropyles end
(B) Filiform apparatus
(C) Integument
(D) Both (a) and (b)



Question No:17

The knowledge of pollen pistil interaction is helpful to plant breeders in which manner?

(A) Manipulating pollen-pistil interaction
(B) To get desired hybrids in incompatible pollination
(C) None of them
(D) Both (a) and (b) are correct



Question No:18

Which one of the following is correct for artificial hybridization?
(A) Combine desirable characters to produce superior varieties
(B) Approach towards crop improvement programme
(C) Desired pollen grains are used for pollination
(D) Stigma is exposed to receive pollen

(A) All are correct
(B) Only A
(C) Only A, B
(D) Only A, Band C



Question No:19

Artificial hybridization is achieved by

(A) Emasculation
(B) (c) Both are required
(C) (b) Bagging
(D) None of them



Question No:20

Emasculation is

(A) Removal of anther from unisexual flowering a pair of forecps.
(B) Removal of anther from flower bud after its dehisces using a pair of forceps
(C) Removal of anther from bisexual flower bud before it dehisces using a pair of forceps
(D) All of the above



Question No:21

Emasculated flowers are covered with bag of suitable size; the process is referred to as

(A) Emasculation
(B) Bagging
(C) Both
(D) None



Question No:22

Why bagging is done in an emasculated flower?

(A) To prevent contamination of its stigma with unwanted pollen
(B) To pollinate the stigma with required anthers only
(C) Both are correct
(D) None of them



Question No:23

Emasculation is not required in flowers with

(A) Only having pistil (unisexual)
(B) Having both pistil and anthers (bisexual)
(C) Having only anthers (unisexual)
(D) All are correct



Question No:24

The female parent plants produce unisexual flowers

(A) Do not require emasculation
(B) Require emasculation
(C) The flowers are bagged during bud stage
(D) Both (a) and (c)



Question No:25

During syngamy

(A) Male gamete fuses with two polar nuclear
(B) Male gamete fuses with egg cell
(C) Both of the above
(D) None of them