Which one is correct about male and female gametophyte?

1. In bryophytes and pteridophytes, they have no independent free-living existence.

2. In bryophytes and angiosperms, they have free-living existence.

3. In gymnosperms and angiosperms, they have no independent free-living existence.

4. In bryophytes, pteridophytes and angiosperms, they have free-living existence.

 

Which of the following is/are correct for gymnosperms?

(i)      They are heterosporous.

(ii)     They are the first vascular plants.

(iii)    They possess fruits.

(iv)    They require water for fertilisation.

1. Only (i)                                 

2. (i) and (ii)

3. (ii) and (iii)                            

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

In gymnosperms, the pollen chamber represents

1. A cavity in the ovule in which pollen grains are stored after pollination.

2. An opening in the megagametophyte through which the pollen tube approaches the egg.

3. The microsporangium in which pollen grains develop.

4. A cell in the pollen grain in which the sperms are formed.

The spreading of living pteridophyte is limited and is restricted to narrow geographical region because of

1. Growth requirements of gametophyte (cool, damp and shady places).

2. Requirement of water for fertilisation.

3. Absence of stomata in leaf and absence of vascular tissue.

4. Both 1. and 2..

Artificial systems gave equal weightage to

1. Morphological and anatomical characters.

2. Vegetative and sexual characters.

3. Vegetative and anatomical characters.

4. Morphological and sexual characters.

According to phylogenetic classification organisms belonging to same taxa

1. Are same in anatomy.

2. Have same genetic constituent.

3. Have a common ancestor.

4. Have all characteristics same.

Choose the correct statement.

1. Many species of Porphyra, Laminaria and Sargassum and among 70 species of marine algae used as food.

2. Agar is used to grow microbes and in preparations of ice creams and jellies.

3. Algae are useful to man in a variety of ways.

4. All of these.

Cell wall of green algae is made up of

1. Inner layer of chitin and outer layer of pectose.

2. Inner layer of cutin and outer layer of pectin.

3. Inner layer of pectose and outer layer of cellulose.

4. Inner layers of cellulose and outer layer of pectose.

Out of the following four statements how many of them are correct for Fucus.
I.  Life – cycle is diplontic.
II. Fertilisation is internal.
III. Sexual reproduction is Oogamous.
IV.  Frond is photosynthetic.
1. 4
2. 3
3. 2
4. 1

Which of the following is not an example of algae in which there is post – fertilization development process?
1. Laminaria
2. Porphyra
3. Polysiphonia
4. Batrachospermum