Sexual Reproduction in Flowering Plants Test

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Sexual Reproduction in Flowering Plants Test - 92

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Weekly Quiz Competition

Question 1
1 / -0

In pea, castor and maize the number of cotyledons are:

A
$$2,2$$ and $$1$$ respectively

B
$$1,2$$ and $$2$$ respectively

C
$$2,1$$ and $$2$$ respectively

D
$$1,2$$ and $$1$$ respectively
Solution
- In monocots seed, has only one cotyledon is present while the dicot seed has two cotyledons.
- Pea and castor are dicot plants so they both have two cotyledons in their seeds.
- In maize, only one cotyledon is present as it is a monocotyledonous plant.
Hence the correct answer is (A).
Question 2
1 / -0

Nucellar embryo is?

A
Apomictic embryo

B
Amphimictic haploid

C
Adventitive embryony

D
Amphimictic diploid
Question 3
1 / -0

How many of the following parts of embryo are derived from "Embryonal/Apical cell".

Plumule, Radicle, Epicotyle, Cotyledon, Root cap, Hypocotyle.

A
Two

B
Three

C
Five

D
One

Solution

Cotyledon and Hypocotyle are the parts of embryo derived from Embryonal/ Apical cell. Hypocotyle becomes part of the plant stem. Cotyledon is a part of seed.
Question 4
1 / -0

Coenomegaspore is involved in formation of ________ type of embryo sac.

A
Polygonum

B
Oenothera

C
Endymion

D
Plumbago
Question 5
1 / -0

Read the following statements:
Which of the above statements are correct?
(i) Wheat, maize barley, castor and sunflower seeds are endospermic or albuminous
(ii) Most zygotes divide only after certain amount of endosperm is formed
(iii) Though the seed differ greatly, the early stages of embryo development is similar in both monocots and dicots
(iv) The zygote divides to form proembryo and subsequently globular, heart-shaped and mature embryo.
(v) Epicotyl and hypocotyl are absent in monocot seeds

A
(i),(ii),(iii)and (iv)

B
(i),(ii)and (iii)

C
(i),(iii)and( v)

D
(iii),(iv)and (v)

E
(i),(v) and (ii)

Solution

A. (i), (ii), (iii) and (iv)
EXPLANATION: Seeds, which store food materials in their endosperm are called endospermic or albuminous seeds, e.g., castor, wheat, grasses, barley, etc. Most zygotes in angiosperms divide after a certain amount of the endosperm is framed. Zygotes divide to form two cells- terminal cell or upper cell and basal cell or lower cell. The terminal cells have globular-shaped proembryo and the basal cells are heart-shaped, due to the presence of two rudimentary cotyledons. In the first stage of embryonic development, a single-celled zygote have many rapid cell divisions. These cell divisions are called cleavage, to form blastula, which are similar to the ball of cells.
Question 6
1 / -0

Which of the following statement is not correct with respect to Anemophily?

A
It is the most primitive form of pollination

B
Pollen grains are light and sticky

C
Stamen & stigma are well exposed

D
Anemophily is quite common in grasses

Solution

The statement not correct with respect to Anemophily is pollen grains are light and sticky.

Anemophily or wind pollination is a form of pollination whereby pollen is distributed by wind. Anemophilous pollen grains ace light and non-sticky so that they can be transported by air currents. They often possess well-exposed stamens and large feathery stigma to easily trap airborne pollen grains. Wind pollinated flowers packed into an inflorescence. Wind pollination is quite common in grasses. It is more common amongst abiotic pollination.
Question 7
1 / -0

In the embryos of a typical dicot and grass, true homologous structures are?

A
Colerrhiza and coleoptile

B
Coleoptile and scutellum

C
Cotyledons and scutellum

D
Hypocotyl and radicle

Solution

In dicotyledons, they have two cotyledons while in grass only one cotyledon is present that is also known as scutellum.
So, the correct answer is C.
Question 8
1 / -0

Pro-embryo becomes heart shaped due to development-

A
Cotyledons

B
Vascular Cambium

C
Radical

D
Epicotyls

Solution

In dicotyledons, the two apical cells first divide by longitudinal division and then by transverse and periclinal division. So there forms a sixteen celled globular embryo or pro-embryo.
Due to the differentiation of the cotyledons, the pro-embryo becomes heart shaped.
Question 9
1 / -0

Fruits of Banyan tree develops from

A
Raceose inflorescene

B
Cymose inflorescene

C
Hypanthodium inflorescene

D
Cyathium inflorescene
Solution
- The racemose inflorescence is also called as indefinite inflorescence.
- The racemose inflorescence is a type of flowering shoot in which the growing region at the tip of the flower stalk continues to produce new flower buds during growth.
- As a result, the youngest flowers are at the top and the oldest flowers are at the base of the stalk.
- Hence, Fruits of Banyan tree develops from Racemose inflorescence.
- So, the correct answer is 'Racemose inflorescence'.
Question 10
1 / -0

Which of the following is the site of pollen deposition?

A
Placenta

B
Thalamus

C
Anther

D
Stigma

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Sexual Reproduction in Flowering Plants Test - 92

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Sexual Reproduction in Flowering Plants Test - 92

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Question 1

$$2,2$$ and $$1$$ respectively

$$1,2$$ and $$2$$ respectively

$$2,1$$ and $$2$$ respectively

$$1,2$$ and $$1$$ respectively

Solution

Question 2

Apomictic embryo

Amphimictic haploid

Adventitive embryony

Amphimictic diploid

Question 3

Two

Three

Five

One

Solution

Question 4

Polygonum

Oenothera

Endymion

Plumbago

Question 5

(i),(ii),(iii)and (iv)

(i),(ii)and (iii)

(i),(iii)and( v)

(iii),(iv)and (v)

(i),(v) and (ii)

Solution

Question 6

It is the most primitive form of pollination

Pollen grains are light and sticky

Stamen & stigma are well exposed

Anemophily is quite common in grasses

Solution

Question 7

Colerrhiza and coleoptile

Coleoptile and scutellum

Cotyledons and scutellum

Hypocotyl and radicle

Solution

Question 8

Cotyledons

Vascular Cambium

Radical

Epicotyls

Solution

Question 9

Raceose inflorescene

Cymose inflorescene

Hypanthodium inflorescene

Cyathium inflorescene

Solution

Question 10

Placenta

Thalamus

Anther

Stigma

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