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Sexual Reproduction in Flowering Plants MCQ

 

Sexual Reproduction in Flowering Plants
MCQ Biology Chapter 1 NCERT For NEET

Sexual Reproduction in Flowering Plants MCQ Biology Chapter 1 NCERT For NEET



1

Another is?

A

Bilobed, dithecous

B

Trilobed, dithecous

C

Tertralobed, dithecous

D

None of the above

Answer

Bilobed, dithecous 

 

2

The anther is a four-sided structure consisting of four ……. Located at corner?

A

Microsporangia

B

Megasporangia

C

Sporogenous tissue

D

Stamen

Answer

Microsporangia

 

3

In transverse section, microsporangium appears near …. in outline?

A

Circular

B

Amoeboid

C

Irregular

D

None

Answer

Circular

 

4

Microsporangium surrounded by four wall layers which include?

A

Epidermis, middle layers

B

Epidermis, endothecium

C

tapetum

D

All of these

Answer

All of these

 

5

Who nourishes the developing pollen grains?

A

Epidermis

B

Tapetum

C

Endothecium

D

Middle layers

Answer

Tapetum

 

6

Cells of tapetum?

A

Have one nucleus

B

Binucleated

C

More than one nucleus

D

Enucleated

Answer

More than one nucleus

 

7

The process of formation of microspores from a pollen mother cell through meiosis is called?

A

Megasporogenesis

B

Microsporogenesis

C

Both A and B

D

None of the above

Answer

Microsporogenesis

 

8

Who represent the male gametophytes?

A

Pollen grain

B

Stamens

C

Anther

D

Both B and C.

Answer

Pollen grain.

 

9

Pollen grain made up of two wall layer outer is …. And inner is….?

A

Intine, exine

B

Exine, intine

C

Only intine

D

Only exine.

Answer

Exine, intine.

 

10

Exine is made up of?

A

Sporopollenin

B

cellulose

C

Pectin

D

Cellulose and pectin

Answer

Sporopollenin

 

11

Intine is made up of?

A

Sporopollenin

B

Cellulose

C

Pectin

D

Cellulose and pectin

Answer

Cellulose and pectin

 

12

In over 60% of angiosperm, pollen grain is shed at?

A

1-celled stage

B

2-celled stage

C

3-celled stage

D

4-celled stage

Answer

2-celled stage

 

13

In some cereals pollen grain lose viability within?

A

60min

B

30min

C

90min

D

Month

Answer

30min

 

14

Pollen grain of a large number of species for years are stored in liquid nitrogen at?

A

-196

B

-200

C

-0

D

-180

Answer

-196

 

15

Gynoecium consists of?

A

Stamen

B

Pistil

C

Placenta

D

Ovary

Answer

Pistil

 

16

Basal bulged part of pistil is the?

A

Stigma

B

Ovary

C

Style

D

Thalamus

Answer

Ovary

 

17

The number of ovules in an ovary may be one in?

A

Papaya

B

Orchids

C

Mango

D

Watermelon

Answer

Mango

 

18

The body of ovules fuses with funicle in the region called?

A

Hilum

B

Micropyle

C

Chalaza

D

Nucellus

Answer

Hilum

 

19

Integument encircle the nucellus except at?

A

Chalaza

B

Funicle

C

Hilum

D

Micropyle

Answer

Micropyle

 

20

The method of embryo sac formation from a single megaspore is termed as?

A

Bisporic

B

Tetrasporic

C

Monosporic

D

None of the above

Answer

Monosporic

 

21

In embryo sac the cell are group together at the micropylar end and constitute the?

A

Antipodal

B

Egg apparatus

C

Synergids

D

Egg cell

Answer

Egg apparatus

 

22

Egg apparatus consists of? 

A

One egg cell and two synergid

B

Two egg cell and two synergid

C

One egg cell and one synergid

D

Two egg cell and one synergid

Answer

One egg cell and two synergid

 

23

Who guide the pollen tubes enter into synergid?

A

Chalaza

B

Egg cell

C

Micropyle

D

Filiform apparatus

Answer

Filiform apparatus

 

24

A typical embryo sac, at maturity, though?

A

8-celled 7 nucleated

B

7-celled 8-nucleated

C

7-celled 7-nucleated

D

8-celled 8-nucleated

Answer

7-celled 8-nucleated

 

25

Transfer of pollen grain shed from the anther to stigma of pistil is termed?

A

Fertilisation

B

Pollination

C

Triple fusion

D

None

Answer

Pollination

 

26

Pollination is achieved within the same flower?

A

Autogamy

B

Cleistogamous

C

Chasmogamous

D

Both A and B

Answer

Both A and B

 

27

Which pollination is functionally cross pollination ang genetically it is similar to autogamy?

A

Xenogamy

B

Pollination in cleistogamous flower

C

Geitonogamy

D

All of these

Answer

Geitonogamy

 

28

Pollination by wind is called?

A

Hydrophily

B

Entomophily

C

Anemophily

D

Ornithophily

Answer

Anemophily

 

29

Light and non-sticky pollen grain are used in pollination by?

A

water

B

Insect

C

Birds

D

Wind

Answer

Wind

 

30

…… pollinated flower often have a single ovule in each ovary?

A

Water

B

Wind

C

Bats

D

Insect

Answer

Wind

 

31

How many genera of monocot plant are limited to hydrophily?

A

80

B

40

C

100

D

30

Answer

30

 

32

Water pollinated plants are?

A

Vallisneria

B

Hydrilla

C

Both A and B

D

Water hyacinth

Answer

Both A and B

 

33

In aquatic plant like water lily and water hyacinth pollination is by?

A

Water

B

Insect

C

Either insect or wind

D

Wind

Answer

Either insect or wind

 

34

Majority of ……. Pollinated flower is large, colorful, fragrant and rich in nectar?

A

Birds

B

Insect

C

Bats

D

Bees

Answer

Insect

 

35

Monoecious plant prevents?

A

Geitonogamy

B

Autogamy

C

Both of these

D

None of these

Answer

Autogamy

 

36

Who has ability to recognize the pollen

A

Ovary

B

Filament

C

Flower

D

Pistil

Answer

pistil

 

36

No need for emasculation in flower?

A

Unisexual

B

Bisexual  

C

Both of these

D

None

Answer

Unisexual

 

   37

Primary endospermic nucleus (PEN) is?

   A

Diploid

   B

Haploid

   C

Triploid

   D

Polyploid

Answer

Triploid

 

   38

Double fertilization include?

   A

Syngamy

   B

Triple fusion

   C

Both A and B

   D

None

Answer

Both A and B

  

   39

The central cell after triple fusion become the ……. And develops into the ….?

   A

Primary endosperm cell and endosperm

   B

Endosperm and primary endosperm cell

   C

Endosperm and embryo

   D

Embryo and endosperm

Answer  

Primary endosperm cell and endosperm

  

   40 

In gymnosperm ploidy of PEN is?

    A

2n

    B

3n

    C

n

    D

4n

Answer

2n

  

    41

In ‘double fertilization’ in angiosperm:

1: syngamy results in the formation of zygote.

2: triple fusion results in the formation of primary endosperm nucleus.

    A

Both 1 and 2 is correct

    B

Only 1 is correct

    C

Only 2 is correct

    D

Both 1 and 2 are incorrect

Answer

Both 1 and 2 are correct

  

    42

Triple fusion in angiosperm is the?

    A

Fusion of second sperm with two antipodal cells

    B

Fusion of second sperm with two synergid cells

    C

Fusion of second sperm with two polar nuclei

    D

All of these

Answer

Fusion of second sperm with two polar nuclei

  

    43

Assertion: primary endosperm nucleus is triploid.

Reason: as this involves the fusion of three haploid nuclei.

    A

both (A) and (R) is true and (R) is correct explanation of (A).

    B

Both (A) and (R) are true but (R) is not the correct explanation of (A).

    C

(A) is true, but (R) is false 

    D

(A)is false, but (R) is true

Answer

both (A) and (R) is true and (R) is correct explanation of (A).

 

 

 

44

Assertion: most zygotes divide only after certain amount of endosperm is formed.

Reason: this is an adaptation to provide assured nutrition to the developing embryo.

A

(A) and (R) is true but (R) is not correct explanation of (A)

B

(A)is the true (R) is false  

C

(A)is false (R) is true

D

(A) and (R) is true and (R) is correct explanation of (A)

Answer

(A) and (R) is true and (R) is correct explanation of (A)

 

45

Correct stages of embryogeny in dicotyledonous embryo:

A

Proembryo, heart-shaped, globular and mature.

B

heart-shaped, Proembryo, mature and globular.

C

Proembryo, globular, heart-shaped and mature.

D

Mature, globular, heart-shaped and proembryo.

Answer

Proembryo, globular, heart-shaped and mature.

 

46

The portion of embryonal axis above the level of cotyledons is the (1) which terminates with the (2).

A

(1)epicotyle (2) plumule

B

(1)plumule (2) epicotyle

C

(1)hypocotyle (2) radicle

D

(1)radicle (2) hypocotyle

Answer

(1)epicotyle (2) plumule

 

47

In the grass family the cotyledone is called ….?

A

Scutellum

B

Coleoptile

C

Coleorhiza

D

Epiblast

Answer

Scutellum

 

48

In angiosperm, final product of sexual reproduction?

A

Fruit

B

Seed

C

Stem

D

Perisperm

Answer

Seed

 

49

Example of non-albuminous seed is?

A

Pea

B

Wheat

C

Barley

D

Castor

Answer

Pea

 

50

Example of albuminous seed are?

A

wheat

B

Maize

C

Castor

D

All of these

Answer

All of these 

 


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