Sexual Reproduction in Flowering Plants Test

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Sexual Reproduction in Flowering Plants Test - 94

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Weekly Quiz Competition

Question 1
1 / -0

While planning for an artificial hybridization programme involving dioecious plants, which of the following steps would not be relevant:

A
Bagging of female flower.

B
Dusting of pollen on stigma.

C
Emasculation.

D
Collection of pollen.

Solution

In case of dioecious plant, male and female flowers are not on a single plant. Hence, emasculation is not necessary. Bagging of the female flower is done to prevent pollination by an undesired variety of the species.
So, the correct answer is 'Emasculation.'
Question 2
1 / -0

The phenomenon observed in some plants wherein parts of the sexual apparatus is used for forming embryos without fertilisation is called:

A
Parthenocarpy.

B
Apomixis.

C
Vegetative propagation.

D
Sexual reproduction.

Solution

When seeds are produced without fertilization, this phenomenon is called apomixis. In parthenocarpy, seeds are not produced which means embryos are not produced. Vegetative propogation involves obtaining progeny plants through vegetative parts of the parent plants like leaf, stem etc. Sexual reproduction involves fusion of gametes and formation of zygote that develops into an embryo.
So, the correct answer is 'Apomixis.'
Question 3
1 / -0

Why flowers are generally so colourful and fragrant?

A
To attract insects.

B
To avoid insects.

C
To kill insects.

D
To scare insects.

Solution

Flowers are colored, showy, and scented so that they can be easily spotted by insects. While feeding on nectar the pollens attach to their body. When the same insect visits another flower it transfers the pollen to the stigma of that flower leading to pollination.
Thus the correct answer is option A.
Question 4
1 / -0

Recurrent apomixis is

A
Parthenogenesis

B
Diploid parthenogenesis

C
Haploid parthenogenesis

D
Agamospermy
Solution
- When the embryo develops directly from a diploid egg, the process is also called recurrent apomixis. Here, the embryo develops parthenogenetically.
- Since parthenogenesis is occurring in a diploid egg, it is also called diploid parthenogenesis.
- In Non-recurrent apomixis, an embryo develops parthenogenetically from a haploid egg.
So, the correct answer is option B.
Question 5
1 / -0

Tretradynamous androecium is with

A
Four equal length stemens

B
Outer 2 short and inner 4 long stamens

C
Outer 2 long and inner 2 short stamens

D
Outer 4 short and inner 2 long stamens

Solution

Tretradynamous androecium is with outer 2 short and inner 4 long stamens. The stamens in a flower are collectively called as the androecium. The androecium in various species of plants form a great variety of patterns, some of them highly complex. Tretradynamous androecium occurs as a set of six filaments with four long and two shorter ones. Therefore, the correct answer is option B.
Question 6
1 / -0

Read the following about the agents of seed dispersal.
a. Xanthium and urena by animals.
b. Drumstick and maple by wind.
c. Groundnut and areca nut by birds.
d. Madar and sunflower by insects.
Select the alternative which includes all the correct statements.

A
a and b

B
a and c

C
c and d

D
b and c

Solution

Seeds dispersal by wind have to be light so that their buoyancy may enable them to float on air for long distances. It is called anemochory where seeds are especially adapted for wind dispersal show following characters. Example: Dandelion, maple, drumstick, etc. Some seeds have spine like structures on them. They get stuck to the fur of animals and thus get spread to different places. Examples; Beggar tick, Xanthium, Urena, etc. Some seeds are swallowed by birds and animals along with fruits. These seeds get dispersed with bird or animal droppings.
Question 7
1 / -0

Hypanthodium inflorescence is pollinated by

A
Water

B
Blastophaga

C
Air

D
Snails

Solution

Hypanthodium is one of the special types of inflorescence. In this type of inflorescence, the receptacle is fleshy and forms a hollow ball-like structure with an apical opening. The inner surface of the receptacle is arranged with three types of flowers. The female flowers are towards the base, male flowers are towards the opening and short-styled sterile female flowers are in between above two. This inflorescence is an adaptation for insect pollination. The inflorescence is pollinated by a gall wasp (Blastophaga). Ficus is an example of this kind of inflorescence. Thus, the correct answer is 'Blastophaga.'
Question 8
1 / -0

Which among the following is not a true tree?

A
Coconut (Cocus nucifera)

B
Peepal (Ficus religiosa)

C
Mango (Mangifera indica)

D
Banyan (Ficus benghalensis)

Solution

Botanically, the coconut palm is not a tree since there is no bark, no branches, or secondary growth. A coconut palm is a woody perennial monocotyledon with the trunk being the stem.
Question 9
1 / -0

Red shoe polish is obtained from

A
China jute

B
China Rose

C
Indian Rose

D
Gul-e-khaira

Solution

Hibiscus (Hibiscus rosa-sinensis; Malvaceae) most commonly known as the "shoe flower" is a native of Asia, specifically China, India and the Pacific islands. The plant species name "rosa-sinensis" means "Chinese rose." It is called "shoe flower" because the flowers were traditionally used to polish shoes in Jamaica and some African countries.The juice from the petals is used in China as shoe-blacking and mascara. Hibiscus has been named the "Queen of Tropical Shrubs" perhaps because it is the most outstanding ornamental shrub that is planted in the tropics as specimen plants or grown as colorful hedges along the roads and highways. The botanical name of Gul e Khaira is Althea rosea L.belongs to Malvaceae. Their roots are used to treat jaundice.
Question 10
1 / -0

If the number of chromosomes, in the foot of fern embryo is 8. What should be the number in its spores?

A
4

B
8

C
16

D
23

Solution

In ferns spores are haploid hence they have half number of chromosomes where as embryo is diploid.

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Re-Attempt Weekly Quiz Competition

Sexual Reproduction in Flowering Plants Test - 94

Result

Sexual Reproduction in Flowering Plants Test - 94

Score

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Rank

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SHARING IS CARING

Question 1

Bagging of female flower.

Dusting of pollen on stigma.

Emasculation.

Collection of pollen.

Solution

Question 2

Parthenocarpy.

Apomixis.

Vegetative propagation.

Sexual reproduction.

Solution

Question 3

To attract insects.

To avoid insects.

To kill insects.

To scare insects.

Solution

Question 4

Parthenogenesis

Diploid parthenogenesis

Haploid parthenogenesis

Agamospermy

Solution

Question 5

Four equal length stemens

Outer 2 short and inner 4 long stamens

Outer 2 long and inner 2 short stamens

Outer 4 short and inner 2 long stamens

Solution

Question 6

a and b

a and c

c and d

b and c

Solution

Question 7

Water

Blastophaga

Air

Snails

Solution

Question 8

Coconut (Cocus nucifera)

Peepal (Ficus religiosa)

Mango (Mangifera indica)

Banyan (Ficus benghalensis)

Solution

Question 9

China jute

China Rose

Indian Rose

Gul-e-khaira

Solution

Question 10

4

8

16

23

Solution

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