Development of Endosperm

Q.

What is chemotaxonomy?

Q. Liquid endosperm in coconut is formed as a result of _________.

1. cytokinesis
2. karyokinesis not followed by cytokinesis
3. absence of karyokinesis
4. cytokinesis not followed by karyokinesis

Q.

Apomictic embryos in Citrus arise from-

1. maternal sporophytic tissue in ovule

2. synergids

3. diploid egg

4. antipodal cells

Q.

The chromosome number in meiocyte is 34. The organism could be

1. Dog

2. Apple

3. Ophioglossum

4. Onion

Q. Coconut water is made up of while the surrounding white kernel constitutes .

1. cellular endosperm
2. nuclear endosperm
3. helobial endosperm
4. solid endosperm

Q. An abnormal human baby with 'XXX' allosome genotype was born due to

1. Fusion of 2 ova and 1 sperm
2. Fusion of 2 sperms and 1 ova
3. Formation of abnormal sperms in father
4. Formation of abnormal ova in mother

Q.

The endosperm is completely consumed by the developing embryo in

1. peas and groundnut

2. maize and castor

3. castor and groundnut

4. maize and pea

Q.

In gymnosperms, what is a nucellus?

Q.

What is the process of cell specialization called?

Q.

Where Are Remnants Of Nucellus Persistent?

Q.

The seed that contains the future plant is called the

1. Embryo

2. Germ cells

3. Seed coat

4. Cotyledons

Q.

Name all the haploid cells present in an unfertilized mature embryo sac of a flawering plant.write the Rotel no. Of cells in it

Q. If the chromosome number in the root cell of Zea mays (maize) is 20. Then what would be the chromosome number in the cell of radicle (a), hypocotyl (b), epiblast (c), aleurone layer (d), and scutellum (e) respectively?

1. a = 20; b = 30; c = 20; d = 30; e = 20
2. a = 30; b = 20; c = 20; d = 20; e = 30
   
3. a = 20; b = 30; c = 30; d = 30; e = 20
4. a = 20; b = 20; c = 20; d = 30; e = 20

Q. The number of chromosomes present in the cells of the bread wheat, Triticum aestivum suggests that it is

1. hexaploid
2. diploid
3. tetraploid
4. pentaploid

Q. Soak a few seeds of wheat, maize, chickpeas, ground nuts in water. Keep it overnight. Now split the seeds and observe the various parts of embryo and seed.

Q.

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?

1. Endosperm

2. Cotyledon

3. Aleurone layer

4. Plumule

Q.

Name two amides found in plants.

Q. In L.S. embryo of grass, which one shows the correct labelling.

1. a—root cap, b—shoot apex, c—scutellum, d—coleoptile, e—epiblast, f—radicle, g—coleorhiza
2. a—scutellum, b—coleoptile, c—shoot apex, d— epiblast, e—radicle, f—root cap, g—coleorhiza
3. a—coleoptile, b—scutellum, c—radicle, d—shoot apex, e—epiblast, f—coleorhiza, g—root cap
4. a—coleorhiza, b—radicle, c—epiblast, d—coleoptile, e—root cap, f—scutellum, g—shoot apex

Q.

Ruminate endosperm occurs in

1. Cruciferae

2. Euphorbiaceae

3. Asteraceae

4. Annonaceae

Q. Study the following statements and select the correct option:

(i) Tapetum nourishes the developing pollen grains.
(ii) Hilum represents the junction between ovule and funicle.
(iii) In aquatic plants, such as water hyacinth and water lily, pollination is by water.
(iv) The primary endosperm nucleus is triploid.

1. (i) and (ii) are correct but (iii) and (iv) are incorrect.

2. (ii), (iii) and (iv) are correct but (i) is incorrect.

3. (i), (ii) and (iv) are correct but (iii) is incorrect.

4. (i) and (iv) are correct but (ii) and (iii) are incorrect.

Q.

In albuminous seeds, food is stored in ______ and in exalbuminous seeds, food is stored in ______.

1. Endosperm, cotyledons

2. Cotyledons, cotyledons

3. Cotyledons, endosperm

4. Endosperm, endosperm

Q. Edible part of paddy is

1. fruit
2. endosperm
3. cotyledon
4. endosperm and embryo

Q.

How primary oocyte is formed?

Q.

Are bryophytes haploid or diploid?

Q.

What is plasmatic growth?

Q.

What is Chara in botany?

Q.

What Is decapitation in Plants?

Q.

Micropyle occurs in

(1) Seed

(2) Ovule

(3) Ovary

(4) Stigma

1. 1 and 3 are correct

2. 1, 2 and 3 are correct

3. 1 and 2 are correct

4. 2 and 4 are correct

Q. Milky water of green coconut is:

1. Liquid nucellus
2. Liquid of female gametophyte
3. Liquid endosperm
4. Liquid embryo

Q.

The single-cell formed after the fusion of male and female gametes is called __________.