Sexual Reproduction in Flowering Plants Test

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Sexual Reproduction in Flowering Plants Test - 90

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Weekly Quiz Competition

Question 1
1 / -0

In the process of pollination, what would move from anther to stigma?

A
Female gamete

B
Pollen grain without coat

C
Pollen grain

D
Seed

Solution

Pollination is the process of transferring pollen grains from anther to stigma. Anthers are pollen-bearing structures in the stamen which is a part of the male reproductive unit. The male gamete is being transferred to the female part called stigma.
So, the correct answer is pollen grain.
Question 2
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A plant bears fruit, has column of vascular tissue and a tap root system, This plant is a/an.

A
Angiosperm and dicot

B
Gymnosperm and dicot

C
Angiosperm and monocot

D
None of the above

Solution

Dicotylodoneae is a group of angiosperms that are characterized by tap root system, vascular tissue present in columns, posses xylem vessels, leaves have reticulate venation, stem with open collateral vascular bundles arranged in a ring and seed are covered by fruits and show secondary growth.
So the correct option is 'Angiosperms and dicot'
Question 3
1 / -0

To form 100 angiosperm seeds, how many mitosis are required?

A
300

B
200

C
500

D
Can't say

Solution

For the formation of male gametophyte, 1 meiosis and 2 mitoses are required.
and for the formation of female gametophyte 1 meiosis and 3 mitoses are required.
One angiosperm seed contains 1 male gametophyte and 1 female gametophyte.
So, to produced 1 angiosperm seed 2+3=5 mitosis will be required.
Thus, to produce 100 angiosperm seeds, 100X5=500 mitosis will be required
S.o the correct option is '500'.
Question 4
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The given figure shows the longitudinal section of two flowers of the same type. Study the following statements with reference to the given figure.

(i) Z and U show self-pollination, whereas Y shows cross-pollination.
(ii) W. X and Z show the transfer of pollen grains that will result in fruit formation.
(iii) Z shows self-pollination while X shows cross-pollination.
(iv) X and Z show pollination that will result in fruit formation.
(v) W X and Y show cross-pollination.

Which of the given statement are true or false?

A
(i) and (iv) are true: (ii), (iii) and (v) are false

B
Only (v) is true: rest are false

C
(i), (ii), (iii) and (v) are true: (iv) alone is false

D
(i), (ii) and (v) are false: (iii) and (iv) are true

Solution

(a) Z and U show self-pollination whereas in Y there is no cross-pollination, as the transfer according to the picture occurs from the anther of one flower to another. So, it is true.
(b) W, X shows cross-pollination so there will be no fruit formation and in Z there occurs self- pollination, so there will be no fruit formation. So, it is false.
(c) Here, Z shows self-pollination while X shows cross-pollination. So, its true.
(d) Here, X and Z both show pollination so that will result in fruit formation.
(e) Here, W X and Y all of them show cross-pollination, from the stamen of one flower to another flower.

So, the correct option is 'Option D'.
Question 5
1 / -0

When vegetative cells of egg form embryo, it is called

A
Diploid polyembryony

B
Apospory

C
Apomixis

D
Adventive polyembrony

Solution

When vegetative cells of egg form embryo, it is called adventive polyembryony. Formation of embryo directly from the diploid sporophytic cells (nucellus or integument i.e vegetative cells) of ovule is called adventive embryony. Such embryos are formed without involving meiosis and sexual fusion, e.g., Citrus, Opuntia, etc. In Citrus, a seed may possess up to 40 embryos.
So, the correct answer is 'Adventive polyembryony'.
Question 6
1 / -0

Pollen-pistil interaction is a dynamic process involving

A
Pollen recognition

B
Promotion of the pollen

C
Inhibition of the pollen

D
All of the above

Solution

A. The pistil has the ability to recognize the pollen, whether it is self or non-self.
B. The pollen grain germinates on the stigma to produce a pollen tube through one of the germ pores. The contents of the pollen grain move into the pollen tube. The pollen tube grows through the tissues of the stigma and style and reaches the ovary.
C. Pollen tube, after reaching the ovary, enters the ovule through the micropyle and then enters one of the synergids through the filiform apparatus.
D. All the events from the pollen deposition on the stigma until pollen tubes enter the ovule are known as pollen pistil interaction. It is a dynamic process involving the above.

So, the correct option is 'All of the above'.
Question 7
1 / -0

Which pollinating agents is responsible to bring about $$80\%$$ of pollination?

A
Insects

B
Water

C
Humans

D
Wind
Solution
- About 80 percent of all plant pollination is biotic i.e it is carried out by insects such as bees, wasps, and birds.
- The remaining 20 percent of abiotically pollinated species, 98 percent is by wind pollination and 2 percent by water pollination.
Question 8
1 / -0

Pollinia are sac-like structures in which?

A
Anther lobes are present

B
Anthers lose their individuality

C
Pollen grains get fused in a mass

D
Yellow substance is secreted

Solution

Pollinia is the coherent mass of pollen grain that is the product of one anther and transfer as one unit pollination. These are greatly observed in flower of orchids and various species of milkweeds.
So the correct option is 'pollen grains get fused in a mass'.
Question 9
1 / -0

Which of the following is capable of forming either a branch or a flower?

A
Intercalary meristem

B
Axillary bud

C
Vegetative bud

D
None of these

Solution

The axillary bud (or lateral bud) is an embryonic shoot located in the axil of a leaf. Each bud has the potential to form shoots and may be specialized in producing either vegetative shoots (stems and branches) or reproductive shoots (flowers).

So, the correct answer is 'Axillary bud'.
Question 10
1 / -0

A true-breeding line is that :-

A
Having undergone continuous cross pollination

B
Having undergone continuous self pollination

C
Shows stable trait inheritance

D
(B) and (C) both

Solution

A true breeding line is one that, having undergone continuous self-pollination shows the stable trait inheritance and expression for several generations.
So the correct answer is "having undergone continuous self-pollination".

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Re-Attempt Weekly Quiz Competition

Sexual Reproduction in Flowering Plants Test - 90

Result

Sexual Reproduction in Flowering Plants Test - 90

Score

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Rank

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SHARING IS CARING

Question 1

Female gamete

Pollen grain without coat

Pollen grain

Seed

Solution

Question 2

Angiosperm and dicot

Gymnosperm and dicot

Angiosperm and monocot

None of the above

Solution

Question 3

300

200

500

Can't say

Solution

Question 4

(i) and (iv) are true: (ii), (iii) and (v) are false

Only (v) is true: rest are false

(i), (ii), (iii) and (v) are true: (iv) alone is false

(i), (ii) and (v) are false: (iii) and (iv) are true

Solution

Question 5

Diploid polyembryony

Apospory

Apomixis

Adventive polyembrony

Solution

Question 6

Pollen recognition

Promotion of the pollen

Inhibition of the pollen

All of the above

Solution

Question 7

Insects

Water

Humans

Wind

Solution

Question 8

Anther lobes are present

Anthers lose their individuality

Pollen grains get fused in a mass

Yellow substance is secreted

Solution

Question 9

Intercalary meristem

Axillary bud

Vegetative bud

None of these

Solution

Question 10

Having undergone continuous cross pollination

Having undergone continuous self pollination

Shows stable trait inheritance

(B) and (C) both

Solution

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