In Phaeophyceae, the spores (zoospores) are

1. Pyriform and bear 2 flagella (one longitudinal and other transverse).

2. Pear-shaped and bear 2 flagella that are laterally attached.

3. Pyriform and bear 2-8, equal and apial flagella.

4. Pear-shaped and bear 2-8, equal and apical flagella.

 

In chlorophyceae and phaeophyceae, the type of sexual reproduction is

1.Isogamous                             2.Anisogamous

3.Oogamous                             4. All of the above

Read the following statement and find out the incorrect statement.

1. Algae usually reproduce vegetatively by fragmentation, asexually by formation of different types of spores and sexually by formation of gametes.

2. Algae are classified into three classes, pteridophytes into four classes and antiosperms into two classes.

3. Algae are chlorophyll bearing simple, thalloid, autotrophic and largely aquatic organisms.

4. The plant body of algae is more differentiated than that of bryophytes.

Read the following statements (a-e) and answer question that follows them.

(a) In liverworts, mosses and ferns gametophytes are free-living.

(b) Gymnosperms and some ferns are heterosporous.

(c) Sexual reproduction in Fucus, Volvox and Albugo is oogamous.

(d) The sporophyte in liverworts in more elaborate than that in mosses.

(e) Both, Pinus and Marchantia are dioecious.

How many of the above statements are correct?

1. One     2. Two

3. Three   4. Four

Read the following statements.

(a) Gymnosperms are heterosporous.

(b) Bryophytes have well developed vessels and sieve tubes.

(c) Strobilus is found in the main plant body of Equisetum.

(d) Antheridia are absent but archegonia are present in female storobil of gymnosperms.

Choose the correct option.

1. All of these                           2. (a), (c) and (d)

3. Only (a)                                 4. (b) and (c)

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.