Alternation of Generation

Q.

The life cycle in which haploid gametophyte and diploid sporophyte phases are equally dominant is termed as-

1. Haplontic

2. Haplo-diplontic

3. Diplontic

4. Triplontic

Q.

In lower plants gametes are produced by ________ division.

1. Mitotic

2. Meiotic

3. Equal

4. Binary

Q.

Select the wrong statement among the following.

1. In plants both haploid and diploid cells can divide by mitosis

2. In diplontic life cycle, meiosis occurs in zygote.

3. Life cycle in Chlamydomonas is haplontic

4. Life cycle in Marchantia in haplo-diplontic

Q.

The first cells of sporophytic and gametophytic generation in plants are

1. zygote and spore respectively.

2. spore and zygote respectively.

3. zygote and spore mother cell respectively.

4. sperm and egg respectively.

Q.

The type of life cycle in which the diploid gametophyte phase is dominant is called

1. Haplontic

2. Haplo-diplontic

3. Diplontic

4. Triplontic

Q.

Identify the type of life cycles represented by the following diagrams.

1. 1⇒ Haplo- diplontic, 2⇒Haplontic, 3 ⇒Diplontic

2. 1⇒ Haplontic, 2⇒Diplontic, 3 ⇒Haplo- diplontic

3. 1⇒ Diplontic, 2⇒Haplo - Diplontic, 3 ⇒ Haplontic

4. 1⇒ Diplontic, 2⇒Haplontic, 3 ⇒ Haplo - Diplontic

Q.

In land plants, by which of the following sequence does the diploid stage progress?

1. Gametophyte - male and female gametes

2. Spores - sporophyte

3. Zygote - sporophyte

4. Zygote - gametophyte

Q.

Choose the incorrect statement from the following.

1. Life cycle in Marchantia in haplo-diplontic

2. In plants both haploid and diploid cells can divide by mitosis

3. Life cycle in Chlamydomonas is haplontic

4. In diplontic life cycle, meiosis occurs in zygote

Q.

What is the process that is exhibited by cryptogams as part of their reproductive cycle, that enables them to stabilise the chromosomal number when required ?

1. Respiration

2. Osmosis

3. Alternation of Generations

4. Diffusion

Q. Zygotic meiosis is characteristic of:

1. Fucus
2. Funaria
3. Chlamydomonas
4. Marchantia