Sexual Reproduction in Flowering Plants Test

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Sexual Reproduction in Flowering Plants Test - 83

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Weekly Quiz Competition

Question 1
1 / -0

Polyembryony was first reported by

A
Leeuwenhoek

B
Strasburger

C
Hofmeister

D
Hanstein
Solution
Polyembryony is the occurrence of more than one embryo in the same seed. It was first observed by Antony von Leeuwenhoek in orange seeds in 1917.
Strasburger in 1884 while working on Monotropa observed the actual fusion of the male gamete with the female gamete i.e. egg and thus, gave the concept of syngamy.
Hofmeister observed the formation of microspore tetrads and gave the organization of embryo sac.
Hanstein gave the histogen theory of shoot apex organization.
So, the correct answer is A.
Question 2
1 / -0

Which one is absent in windy areas

A
Birds

B
Anemophilous plants

C
Zoophilous plants

D
Insects

Solution

Windy areas are favorable for plants in which pollination is done by the wind like corn, willow etc while it is unfavorable for those in which pollination is done by animals as it is very difficult to survive.
So the correct option is 'Zoophilous plants'.
Question 3
1 / -0

Which is not true about emasculation of a flower while performing an artificial cross ________________.

A
It is removal of anthers from flower

B
It is done before anthesis

C
It is to avoid self pollination

D
It is done in flowers of plants selected as male parent.

Solution

Removal of anthers from the bisexual flowers of female parent, during hybridization process, is called Emasculation. It is used to avoid unknown self pollination.
So, the correct option is ‘it is done in flowers of plants selected as male parent’.

Question 4

1 / -0

Find the correct match

	I		II
(a)	Use of bisexual flowers as female flowers	i.	Clonal selection
(b)	Incorporation of several desirable characters into a single variety	ii.	Pure line selection
(c)	Exploiting hybrid vigour for several generations	iii.	Emasculation
(d)	Improving local varieties of self pollinated plants	iv.	Hybridisation
		v.	Polyploidy breeding

a-iv, b-v, c-iii, d-i

a-ii, b-iii, c-iv, d-v

a-iii, b-iv, c-i, d-ii

a-i, b-v, c-ii, d-iv

Solution

So the correct option is 'a-iii, b-iv, c-i, d-ii'

I	II
A)Use of bisexual flowers as female flowers	Emasculation (The process in which the anther of the flower is removed)
B)Incorporation of several desirable characters into a single variety	Hybridization (The process in which the introduction of several desired genes is carried out by genetic engineering).
C)Exploiting hybrid vigor for several generations	Clonal Selection(used for asexual reproduction of plants)
D)Improving local varieties of self-pollinated plants	Pure line selection (used to keep certain characters throughout generations)

Question 5
1 / -0

Removal of anthers of some flowers during plant breeding is

A
Anthesis

B
Emasculation

C
Pollination

D
For collection of pollen

Solution

The process of removing anther using forceps from a bisexual flower to release pollen grains during hybridization process is called as emasculation.
So the correct option is 'Emasculation'.
Question 6
1 / -0

Emasculation of female plant having bisexual flowers is carried out in hybridisation program with the help of forceps by removing

A
Style before dehiscence of anthers

B
Style after dehiscence of anthers

C
Anthers before their dehiscence

D
Anthers after their dehiscence

Solution

Emasculation is the artificial process of infertility in which the removal of the anthers from the flower bud before the dehiscence using a pair of forceps and then covered with a bag to prevent contamination and is usually done in the morning for the fast healing process.
So the correct option is 'Anthers before their dehiscence'
Question 7
1 / -0

Emasculation of flowers is carried out through removal of

A
Stigma

B
Sepals and petals

C
Anthers

D
Entire organism

Solution

The process of removing anther using forceps from a bisexual flower to release pollen grains during hybridization process is called as emasculation.
So the correct option is 'Anthers'.
Question 8
1 / -0

The polyembryony commonly occurs in.

A
Tomato

B
Potato

C
Citrus

D
Turmeric

Solution

Polyembryony refers to development of more than one embryos inside the seed. It is more common in gymnosperm than angiosperm. In angiosperm, it is generally present as an usual feature in few cases like citrus. In citrus there are up to 10 nucellar embryos.
So, the correct option is C.
Question 9
1 / -0

Emasculation is part of

A
Hybridisation

B
Pure line selection

C
Mass selection

D
Clonal selection

Solution

The process of removing anther using forceps from a bisexual flower to release pollen grains during hybridization process is called as emasculation.
So the correct option is 'Hybridisation'.
Question 10
1 / -0

Bagging is done to

A
Achieve desired pollination

B
Prevent contamination from unwanted pollen

C
Avoid self pollination

D
Avoid cross pollination.

Solution

The emasculated flowers should be kept properly covered so that no untoward cross-pollination takes place. This is done by enclosing the emasculated flowers in muslin, oil paper or polythene bags.
So the correct option is 'Prevent contamination from unwanted pollen'.

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Re-Attempt Weekly Quiz Competition

Sexual Reproduction in Flowering Plants Test - 83

Result

Sexual Reproduction in Flowering Plants Test - 83

Score

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SHARING IS CARING

Question 1

Leeuwenhoek

Strasburger

Hofmeister

Hanstein

Solution

Question 2

Birds

Anemophilous plants

Zoophilous plants

Insects

Solution

Question 3

It is removal of anthers from flower

It is done before anthesis

It is to avoid self pollination

It is done in flowers of plants selected as male parent.

Solution

Question 4

a-iv, b-v, c-iii, d-i

a-ii, b-iii, c-iv, d-v

a-iii, b-iv, c-i, d-ii

a-i, b-v, c-ii, d-iv

Solution

Question 5

Anthesis

Emasculation

Pollination

For collection of pollen

Solution

Question 6

Style before dehiscence of anthers

Style after dehiscence of anthers

Anthers before their dehiscence

Anthers after their dehiscence

Solution

Question 7

Stigma

Sepals and petals

Anthers

Entire organism

Solution

Question 8

Tomato

Potato

Citrus

Turmeric

Solution

Question 9

Hybridisation

Pure line selection

Mass selection

Clonal selection

Solution

Question 10

Achieve desired pollination

Prevent contamination from unwanted pollen

Avoid self pollination

Avoid cross pollination.

Solution

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