Question 1

Question 1: Insect pollinated flowers usually possess ……………… (a) sticky pollen with a rough surface (b) large quantities of pollens (c) dry pollen with a smooth surface (d) light-colored polle

Accepted Answer

(a) sticky pollen with a rough surface

Question 2

Question 2: In ovule, meiosis occurs in ……………… (a) Integument (b) Nucellus (c) Megaspore (d) Megaspore mother cell

Accepted Answer

(d) Megaspore mother cell

Question 3

Question 3: The ploidy level is NOT the same in ……………… (a) Integuments and nucellus (b) Root tip and shoot tip (c) Secondary nucleus and endosperm (d) Antipodals and synergids

Accepted Answer

(c) Secondary nucleus and endosperm

Question 4

Question 4: Which of the following types require pollination but result is genetically similar to autogamy? (a) Geitonogamy (b) Xenogamy (c) Apogamy (d) Cleistogamy

Accepted Answer

(a) Geitonogamy

Question 5

Question 5: If diploid chromosome number in a flowering plant is 12, then which one of the following will have 6 chromosomes? (a) Endosperm (b) Leaf cells (c) Cotyledons (d) Synergids

Accepted Answer

(d) Synergids

Question 6

Question 6: In angiosperms, endosperm is formed by/ due to ……………… (a) free nuclear divisions of megaspore (b) polar nuclei (c) polar nuclei and male gamete (d) synergids and male gametes

Accepted Answer

(c) polar nuclei and male gamete

Question 7

Question 7: Point out the odd one. (a) Nucellus (b) Embryo sac (c) Micropyle (d) Pollen grain

Accepted Answer

(d) Pollen grain

Question 8

Question 1: The part of gynoecium that determines the compatible nature of pollen grain.

Accepted Answer

Stigmatic surface.

Question 9

Question 2: How many haploid cells are present in a mature embryo sac?

Accepted Answer

6 cells, 2 synergids, 1 egg cell, 3 antipodals.

Question 10

Question 3: Even though each pollen grain has 2 male gametes why at least 20 pollen grains are required to fertilize 20 ovules in a particular carpel?

Accepted Answer

Angiosperms have phenomenon of double fertilization in which both the male gametes are utilized, one for fusion with egg cell to form zygote and other for fusion with secondary nucleus to form endosperm.

Question 11

Question 4: Megasporogenesis

Accepted Answer

It is the process of formation of haploid megaspores from diploid megaspore mother cell.

Question 12

Question 5: What is hydrophily?

Accepted Answer

Transfer of pollen grains in pollination process through agency of water is known as hydrophily.

Question 13

Question 6: The layer which supplies nourishment to the developing pollen grains.

Accepted Answer

Tapetum

Question 14

Question 7: Parthenocarpy

Accepted Answer

The condition in which fruit is developed without the process of fertilization is called parthenocarpy.

Question 15

Question 8: Are pollination and fertilization necessary in apomixis?

Accepted Answer

Apomixis is formation of embryos without formation of gametes hence there is no need of pollination and fertilization.

Question 16

Question 9: The part of pistil which develops into fruit and seed.

Accepted Answer

Ovary develops into fruit and ovules into seed.

Question 17

Question 10: What is the function of filiform apparatus ?

Accepted Answer

Filiform apparatus guides the pollen tube towards egg cell.

Question 18

Question 1: How polyembryony can be commercially exploited?

Accepted Answer

Step-by-step solution provided.

Question 19

Question 2: Pollination and seeds formation are very crucial for the fruit formation, Justify.

Accepted Answer

Step-by-step solution provided.

Question 20

Question 3: Incompatibility is a natural barrier in the fusion of gametes. How will you explain this statement?

Accepted Answer

Step-by-step solution provided.

Question 21

Question 4: Describe three devices by which cross pollination is encouraged in Angiosperms by avoiding self-pollination?

Accepted Answer

Step-by-step solution provided.

Question 22

Question 1: Describe the process of double fertilization.

Accepted Answer

Double fertilization: (1) Out of the two male gametes produced by the male gametophyte in angiosperms, one unites with the female gamete and the other with the secondary nucleus. Since both the male gametes take part in fertilization and fertilization occurs twice, it is called double fertilization.

Question 23

Question 2: Explain the stages involved in the maturation of microspore into male gametophyte. OR Describe the development of male gametophyte before pollination in angiosperms. OR Sketch and

Accepted Answer

Step-by-step solution provided.

Question 24

Question 3: Explain the development of dicot embryo.

Accepted Answer

Development of embryo (dicot) in angio- sperm: The oospore undergoes a transverse division to form a large basal cell towards the micropyle and a small apical or terminal cell towards the chalaza of the embryo sac. This two celled structure is called proembryo. The basal cell or suspensor initial un

Question 25

Question 4: Draw a diagram of the L.S of anatropous ovule and list the components of embryo sac and mention their fate after fertilization.

Accepted Answer

Components of Embryo sac.

Question 26

Question 1: The ……………… collects the pollen grains.

Accepted Answer

biotic agents

Question 27

Question 2: The male whorl, called the ……………… produces ………………

Accepted Answer

androecium, pollen grains

Question 28

Question 3: The pollen grains represent the ………………

Accepted Answer

male

Question 29

Question 4: The ……………… contains the egg or ovum.

Accepted Answer

embryo sac

Question 30

Question 5: …………….. takes place when one male gamete and the egg fuse together. The fertilized egg grows vs into seed from which the new plants can grow.

Accepted Answer

Fertilization

Column I (Structure Before seed formation)	Column II (Structure After seed formation)
A. Funiculus	i. Hilum
B. Scar of Ovule	ii. Tegmen
C. Zygote	iii. Testa
D. Inner Integument	iv. Stalk of Seed
	v. Embryo

Chapter 1 Reproduction in Lower and Higher Plants Solutions