Sexual Reproduction In Flowering Plants

Question 1

Several……….and………….changes are initiated which lead to the differentiation and further development of the floral primordium

Answer 1

hormonal. structural

Question 2

The proximal end of the filament is attached to the………or……….of the flower.

Answer 2

thalamus

the petal

Question 3

typical microsporangium appears near……….in outline

Answer 3

circular

Question 4

Outer three wall layers perform the function of protection and not all help in dehiscence of anther to release the pollen.
True or false

Answer 4

False

outer three wall layers perform the function of protection and help in dehiscence of anther to release the pollen.

Question 5

In young anther a group of compactly arranged………… cells called the sporogenous tissue occupies the centre of………..microsporangium.

Answer 5

homogenous

each

Question 6

The pollen grains represent the male gametes
True or false

Answer 6

False

The pollen grains represent the male gametophytes

Question 7

Pollen grains are generally spherical measuring about……….micrometers in diameter

Answer 7

25-50 diameter

Question 8

one of the most resistant organic material known………

Answer 8

sporopollenin

Question 9

Thin and continuous layer made up of cellulose and pectin……..

Answer 9

intine

Question 10

Statement 1: Vegetative cell has abundant food reserve and a large regularly shaped nucleus
Statement 2: The generative cell is small and floats in the cytoplasm of the vegetative cell. It is spindle shaped with dense cytoplasm and a nucleus.

Answer 10

Statement 1 is False
irregularly shaped nucleus

Question 11

60 per cent of angiosperms, pollen grains are shed at

Answer 11

2-celled stage

Question 12

Parthenium or carrot grass that came into India as a contaminant with imported <rice/wheat> has become ubiquitous

Answer 12

wheat

Question 13

Pollen viability is highly variable and to some extent depends on the……….&………..

Answer 13

prevailing temperature and humidity

Question 14

In some cereals such as rice and wheat, pollen grains lose viability within……..of their release

Answer 14

30 minutes

Question 15

In some families like ………./……/……. they maintain viability for months

Answer 15

Rosaceae, Solanaceae Leguminoseae
“Rose Sold her Leg”

Question 16

store pollen grains of a large number of species for years in liquid………… at……. Degree Celsius

Answer 16

Nitrogen -196

Question 17

Ovule is a small structure attached to the placenta by means of a stalk called…… and the body of the ovule fuses with funicle in the region called…….. and represents junction between ovule and funicle

Answer 17

funicle

hilum

Question 18

Chalaza, representing the <basal /top> part of the ovule.

Answer 18

basal

Question 19

Six of the eight nuclei are surrounded by…….. and organised into cells;

Answer 19

cell walls

Question 20

Synergids have special cellular thickenings at the micropylar tip called……….

Answer 20

filiform apparatus

Question 21

Filiform apparatus play an important role in guiding the pollen tubes into the……..

Answer 21

synergid

Question 22

Transfer of pollen grains from the anther to the stigma of the same flower is ………..

Answer 22

Autogamy

Question 23

Viola (common pansy), Oxalis, and Commelina

Answer 23

produce two types of flowers – chasmogamous and cleistogamous

Question 24

Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called………

Answer 24

Geitonogamy

Question 25

Majority of plants use agents for pollination

Answer 25

Biotic

Question 26

Pollination by water is quite rare in flowering plants and is limited to about……… genera, mostly……

Answer 26

30 monocotyledons

Question 27

Water pollination examples

Answer 27

Vallisneria and Hydrilla which grow in fresh water marine sea-grasses such as Zostera

Question 28

Tallest flower of……..

Answer 28

Amorphophallus 6 feet in height

Question 29

Moth deposits its egg into the ……. Of ovary

Answer 29

Locule Seen between Pronuba yuccashella (moth) and Yucca plant

Question 30

Many insects may consume pollen or nectar without bringing about pollination. Such visitors are referred to…………

Answer 30

Pollen robbers

Question 31

Majority of flowering plants produce…………… flowers

Answer 31

Hermaphrodite

Question 32

Continued self pollination results in ……………….

Answer 32

Inbreeding depression

Question 33

Unisexual flower but bisexual plants are……./………../…../……/…….

Answer 33

Castor maize coconut palm cucurbits

Question 34

For pollen shed at 2 called stage the generative cell divides to form male gametes ………… growth of pollen tube.

Answer 34

During

Question 35

All events from pollen deposition until …………. Into ovule is called pollen pistil interaction

Answer 35

Enters of pollen tube

Question 36

If female parent is unisexual flower then only bagging is required and the flower is bagged True or false

Answer 36

False The flower buds are bagged before flowers open

Question 37

Endosperm development proceeds after embryo development True or false

Answer 37

False Endosperm dvp. Precede embryo dvp.

Question 38

Embryo develops at…………. End of the…………..

Answer 38

Micropylar end of the embryo sac

Question 39

Radicle and root cap are enclosed in ……………. Sheet coleorrhiza

Answer 39

Undifferentiated

Question 40

Epicotyl has shoot apex and few ……………….. enclosed in hollow………… structure coleoptile

Answer 40

Leaf primordia Foliar

Question 41

In non albuminous seeds endosperm is completely used up: Examples of such seeds

Answer 41

Pea groundnut beans Malveaceae Astereaceae Fabeaceae

Question 42

Albuminous seeds retain part of endosperm Examples 5

Answer 42

Solanaceae Liliaceae Brasicasseae Poaceae Wheat Maize Barley Castor Coconut

Question 43

Residual persistent nucellus is termed as ………… And is present in……/…….

Answer 43

Perisperm Black pepper Beet

Question 44

As seed matures its water content is reduced and seed becomes relatively dry I.e……

Answer 44

10 to 15% moisture by mass

Question 45

As seed matures general metabolic activity of embryo increase rapidly True or false

Answer 45

False It slows down

Question 46

In some fruits………. Also contribute to formation of fruit. Such fruit is called false fruit. It is found in……/……/……

Answer 46

Thalamus Apple Cashew nuts Strawberry

Question 47

Parthenocarpy can be induced by application of ……….. hormones such as ……/……

Answer 47

Growth hormones Auxins and giberallic acid

Question 48

………… and ………… of the mature seeds are crucial for storage of seeds

Answer 48

Dehydration and dormancy

Question 49

Lupinus arcticus excavated from……………. germinated and flowered after ……… years

Answer 49

Arctic tundra 10000

Question 50

Phoenix dactylifera discovered at king ……….. near……… was viable after ………

Answer 50

Herods palace Dead Sea 2000 years

Question 51

……….. and ………. Have evolved special mechanism to produce seeds without fertilisation called…………

Answer 51

Astereaceae and grasses Apomixis

Question 52

Apomixis is form of…….. reproduction that mimics……….. reproduction

Answer 52

Asexual Sexual

Question 53

In ……/……. some nucellar cells divide and protrude into the embryo sac and develop into embryo. This is kind of Apomixis known as………….

Answer 53

Citrus and mango varieties Non recurrent Apomixis

Question 54

Parasite plant species

Answer 54

Orobranche grasses Striga

Question 55

Multicarpelary syncarpous ovary found in……./……/……

Answer 55

Mustard Tomato Papaver

Question 56

Multicarpelary apocarpous ovary found in……../……/……

Answer 56

Lotus Rose Michellia

Question 57

A typical angiosperm anther is bilobed with each lobe having two theca, i.e., they are dithecous

Answer 57

True Malveaceae is exceptional to this In them monothecous bisporangiate anther is present

Question 58

The tapetum consist of two important molecules or enzymes

Answer 58

Callase: It degrades the callose wall surrounding microspore tetrads, facilitating the release of individual microspores. This process is crucial for proper pollen development and male fertility. Ubisch granules: These are responsible for synthesis of pollen kit and sporopolinine

Question 59

Germ pores are present on………

Answer 59

Exine

Question 60

During megasporogenesis the megaspore mother cell is differentiated at………… and divides to form 4 megaspores out of which one is functional residing to the ………. end

Answer 60

Micropylar Chalazal

Question 61

In a majority of aquatic plants such as………. & ………. the flowers emerge above the level of water and are pollinated by insects or wind as in most of the land plants

Answer 61

water hyacinth and water lily

Question 62

In Vallisneria, the female flower reach the surface of water by the long stalk and the male flowers or pollen grains are released on to the surface of water. They are carried passively by water currents. This kind of hydrophily is known as……

Answer 62

Epihydrophilly

Question 63

The flowers pollinated by………. and………. secrete foul odours to attract these animals.

Answer 63

flies beetles

Question 64

In some species, the diploid egg cell is formed without reduction division and develops into the embryo without fertilisation. This is known as

Answer 64

Recurrent Apomixis