Question

Oogamous type of reproduction is seen in
1. Fucus
2. Anabaena
3. Nostoc
4. Volvox

A. 1 only
B. 1 and 2 only
C. 1 and 3 only
D. 3 only
E. 1 and 4 only

Answer 1

In Algae there are three forms of sexual reproduction. Male and female gametes fuse to form a diploid cell. These gametes vary in sizes and form the basis for a type of sexual reproduction. These gametes may be flagellate and if flagellate they are motile.

Complete answer:
Three forms of sexual reproduction:

Isogamy: In this type, both the fusing gametes are similar they are physiologically and morphologically similar and similar in size. Gametes may be flagellate or non-flagellate.
Anisogamy: In this type, the female gamete larger – macrogamete and the male gamete smaller- microgamete and thereby the gametes differ in size and behavior.
Oogamy: In this type, the female gamete large- nonflagellate and the male gamete smaller – flagellate and motile.
1. Fucus- Oogamous form of reproduction
2. Anabaena- Vegetative reproduction and asexual reproduction
3. Nostoc- Vegetative reproduction and asexual reproduction
4. Volvox- Oogamous.