Sexual Reproduction in Flowering Plants Test

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Sexual Reproduction in Flowering Plants Test - 55

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Weekly Quiz Competition

Question 1
1 / -0

The inner integument in majority of seeds is represented by

A
Hypocotyl

B
Scutellum

C
Tegmen

D
Funicle

Solution

The outer thick layer is called as testa and inner thin one as tegmen. The seed develops from the tissue, that is the integument which originally surrounds the ovule. The seed coat forms from the two integuments or outer layers of cells of the ovule, which derive from tissue from the mother plant, the inner integument forms the tegmen and the outer forms the testa. The seed coats of some mononocotyledon plants, such as the grasses, are not distinct structures, but are fused with the fruit wall to form a pericarp.
Therefore, the correct answer is option C.
Question 2
1 / -0

Which one of the following is an endospermic seed?

A
Pea

B
Bean

C
Gram

D
Castor
Solution
- There are two types of seeds viz., endospermic and non-endospermic.
- Endospermic seeds have the food reserve remains in the endosperm. Castor is an endospermic seed.
Therefore, the correct answer is option D.
Question 3
1 / -0

Aleurone layer in the seed helps in

A
Embryo protection

B
Utilization of stored food

C
Storage of food in endosperm

D
All of the above

Solution

Aleurone layer in the seed helps in embryo protection, utilization of stored food and storage of food. Aleurone is a protein found in protein granules of maturing seeds and tubers. The term also describes one of the two major cell types of the endosperm, the aleurone layer. The aleurone layer is the outermost layer of the endosperm, followed by the inner starchy endosperm. This layer of cells is sometimes referred to as the peripheral endosperm. It lies between the pericarp and the hyaline layer of the endosperm. Unlike the cells of the starchy endosperm, aleurone cells remain alive at maturity.
Thus, the correct answer is option D.
Question 4
1 / -0

Cotyledonary node of embryo lies between

A
Hypocotyl and radicle

B
Epicotyl and plumule

C
Epicotyl and hypocotyl

D
Cotyledons and radicle

Solution

Cotyledonary node of embryo lies between epicotyl and hypocotyl. The epicotyl is the embryonic shoot above the cotyledons. In most plants the epicotyl will eventually develop into the leaves of the plant. In dicots, the hypocotyl is what appears to be the base stem under the spent withered cotyledons and the shoot just above that is the epicotyl.
In monocot plants, the first shoot that emerges from the ground or from the seed is the epicotyl, from which the first shoots and leaves emerge.
Therefore, the correct answer is option C.
Question 5
1 / -0

In hypogeal germination, the active region is

A
Hypocotyl

B
Epicotyl

C
Radicle

D
Tigellum

Solution

In hypogeal germination, cotyledons remain underground and plumule is elongated above the ground.
Hypocotyl is part of the stem situated below the cotyledons. If hypocotyl is the active region, then it will elongate and will bring cotyledons above the ground. But, as stated above cotyledons remain underground.
Radicle gives rise to primary root during germination process.
Tigellum is the main axis of embryo which protrudes out of the cotyledons and forms radicle and plumule during germination process.
Epicotyl is part of the stem above cotyledons. During germination process, epicotyl being the active region elongates and pushes plumule above the ground and cotyledons remain underground.
Thus, the correct answer is option B.
Question 6
1 / -0

What is pollination?

A
Transfer of male gamete to stigma.

B
Transfer of female gamete to stigma.

C
Production of male gamete in stigma.

D
Production of male gamete.

Solution

Pollination is the process by which male gamete or pollen is transferred from the anther or the male part to the stigma or the female part of the plant thereby enabling fertilization and reproduction.
Thus, the correct answer is option (A), 'Transfer of male gamete to stigma.
Question 7
1 / -0

In coconut, the central cavity full of coconut water is the ....................

A
Original embryo sac vacuole while the nuclei around it form the peripheral endosperm kernel

B
Liquid endosperm only

C
Cellular endosperm

D
All of the above

Solution

In coconut, the central cavity full of coconut water is the liquid endosperm. Liquid endosperm functions as the nourishing tissues for the growth of embryo. Coconut juice is an example for nuclear type of endosperm formation.
Question 8
1 / -0

The family having flowers with the longest styles is

A
Fabaceae

B
Asteraceae

C
Poaceae

D
Cyperaceae

Solution

The family having flowers with the longest styles is Poaceae. Flowers of Poaceae are characteristically arranged in spikelets, each spikelet having one or more florets. The spikelets are further grouped into panicles or spikes. A spikelet consists of two (or sometimes fewer) bracts at the base, called as glumes, followed by one or more florets.
Therefore, the correct answer is option C.
Question 9
1 / -0

Which of the following forms a radicle in a dicot embryo?

A
Epibasal tier of embryo

B
Hypobasal tier of embryo

C
Hypophysis of suspensor

D
Terminal cell of suspensor

Solution

Hypophysis of embryo is defined as the top cell of the suspensor in a dicot embryo, which will differentiate to form part of the root cap. In subsequent torpedo and cotyledonary stages of embryogenesis, the embryo completed its growth by elongating and enlarging.
Question 10
1 / -0

Horticulturists prefer nucellar adventive embryos because

A
They show high mortality rate.

B
They are pathogen free.

C
They possess fibrous root system.

D
It is easy to be induced by mutations.

Solution

In adventitious embryony, an embryo is formed directly from nucellus or integument tissue. Nucellar embryony is a form of seed reproduction that occurs in certain plant species, including many citrus varieties. It helps in generating disease free plants.
So, the correct answer is 'They are pathogen free.'

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Re-Attempt Weekly Quiz Competition

Sexual Reproduction in Flowering Plants Test - 55

Result

Sexual Reproduction in Flowering Plants Test - 55

Score

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Rank

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SHARING IS CARING

Question 1

Hypocotyl

Scutellum

Tegmen

Funicle

Solution

Question 2

Pea

Bean

Gram

Castor

Solution

Question 3

Embryo protection

Utilization of stored food

Storage of food in endosperm

All of the above

Solution

Question 4

Hypocotyl and radicle

Epicotyl and plumule

Epicotyl and hypocotyl

Cotyledons and radicle

Solution

Question 5

Hypocotyl

Epicotyl

Radicle

Tigellum

Solution

Question 6

Transfer of male gamete to stigma.

Transfer of female gamete to stigma.

Production of male gamete in stigma.

Production of male gamete.

Solution

Question 7

Original embryo sac vacuole while the nuclei around it form the peripheral endosperm kernel

Liquid endosperm only

Cellular endosperm

All of the above

Solution

Question 8

Fabaceae

Asteraceae

Poaceae

Cyperaceae

Solution

Question 9

Epibasal tier of embryo

Hypobasal tier of embryo

Hypophysis of suspensor

Terminal cell of suspensor

Solution

Question 10

They show high mortality rate.

They are pathogen free.

They possess fibrous root system.

It is easy to be induced by mutations.

Solution

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