Alternation of Generation

Q.

Does alternation of generations occur in all plants?

Q.

Which generation is dominant in angiosperms?

Q. Which of the following algae exhibit diplontic life cycle?

1. Volvox
2. Spirogyra
3. Fucus
4. Ectocarpus

Q. Haplontic life cycle is exhibited by

1. Fucus
2. Ectocarpus
3. Polysiphonia
4. Volvox

Q.

Zygotic meiosis is observed in

1. algae

2. bryophytes

3. gymnosperms

4. pteridophytes

Q. The dominant photosynthetic phase in a haplontic life cycle is the

1. sporophyte
2. gametophyte
3. zygote
4. gamete

Q.

The plant life cycle alternates between a sporophyte and a gametophyte. Usually, in the sporophyte stage

1. Gametes are produced

2. Meiosis occurs

3. Only mitosis takes place

4. Gametophytes form

Q. Diploid sporophyte is the dominant, photosynthetic, independent phase in plants exhibiting

1. haplontic life cycle
2. diplontic life cycle
3. haplo-diplontic life cycle
4. diplo-haplontic life cycle

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. Match the columns I and II and choose the correct combination from the options given: Column I Column II

a. Haplontic life cycle	i. Gymnosperms and angiosperms
b. Diplontic life cycle	ii. Spirogyra
c. Haplo-diplontic life cycle	iii. Bryophytes and pteridophytes

1. a-i, b-ii, c-iii
2. a-iii, b-i, c-ii
3. a-ii, b-i, c-iii
4. a-ii, b-iii, c-i

Q.

Recognise the events in the diagram given below numbered 1-4 .

1. 1-(ii), 2-(i), 3-(iii), 4-(iv)

2. 1-(iv), 2-(i), 3-(iii), 4-(ii)

3. 1-(i), 2-(ii), 3-(iii), 4-(iv)

4. 1-(iv), 2-(iii), 3-(i), 4-(ii)

Q.

The plant life cycle alternates between a sporophyte and a gametophyte. Usually, in the sporophyte stage

1. Gametes are produced

2. Meiosis occurs

3. Only mitosis takes place

4. Gametophytes form

Q.

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

1. 1$\to$ Diplontic, 2$\to$ Haplo-diplontic, 3 $\to$ Haplontic

2. 1$\to$ Diplontic, 2$\to$ Haplontic, 3$\to$ Haplo-diplontic

3. 1$\to$ Haplo-diplontic, 2$\to$ Haplontic, 3 $\to$ Diplontic

4. 1$\to$ Haplontic, 2$\to$ Diplontic, 3 $\to$ Haplo-diplontic