Reproduction in Algae

Q. Which of the following statements is true regarding reproduction in phaeophyceae?

1. Vegetative reproduction takes place by fragmentation.
2. Asexual reproduction in most brown algae is by non-flagellated zoospores.
3. Zoospores are pear-shaped and have two unequal laterally attached flagella.
4. Sexual reproduction may be isogamous, anisogamous or oogamous.

Q.

The most common, flagellated asexual spores of algae are called

1. zygospore

2. oospore

3. aplanospores

4. zoospores

Q.

Volvox and Fucus sexually reproduce by

1. all the above

2. oogamy

3. isogamy.

4. anisogamy.

Q.

Embryo is not formed in ___.

1. Bryophytes

2. Algae

3. Gymnosperms

4. Pteridophytes

Q. Choose the correct statements.

1. Isogamy - identical gametes; Anisogamy - non identical gametes; Oogamy - non-motile male gametes; small motile female gamete
2. Isogamy - identical gametes; Anisogamy - gametes identical only in shape; but not in size; Oogamy - large, non-motile female gamete, small motile male gamete
3. Isogamy - identical gametes; Anisogamy - single female gamete; Oogamy - large, non-motile female gamete, small motile male gamete
4. Isogamy - identical gametes; Anisogamy - non-identical gametes; Oogamy - large, non-motile female gamete, small motile male gamete

Q. Which among the following are wrong?

1. Uniflagellate gametes - Polysiphonia
2. Biflagellate zoospores - Brown algae
3. Gemma cups - Marchantia
4. Unicellular organisms - Chlorella

Q. Zygotic meiosis is a characteristic of

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

Q. Which among the following is a feature common in green, brown and red algae?

1. Stored food
2. Cell wall composition
3. Pigments
4. Vegetative reproduction

Q. Which of the following alga shows multicellular, jacketed sex organs?

1. Spirogyra
2. Chara
3. Sargassum
4. Ectocarpus

Q. Asexual reproduction by non-motile spores is seen in

1. Ectocarpus
2. Porphyra
3. Chlamydomonas
4. kelps