Question

In which of the following sets of organisms, does external fertilization occur?

• A. Hemichordata and fern
• B. Amphibian and algae
• C. Reptile and gymnosperm
• D. Echinodermata and moss

Answer 1

The correct option is B Amphibian and algae

External fertilisation involves the fusion of the gametes outside the body of the organism, in an external medium such as water.

Internal fertilisation involves the fusion of the gametes inside the body of the female or the female sex organ (in case of bisexuals). The male gamete makes its way upto the female gamete for fertilisation.

Echinoderms show external fertilisation whereas in all bryophytes including mosses fertilisation is internal.

In Phylum Hemichordata the fertilisation is external whereas in pteridophytes such as ferns the fertilisation is internal.

All animals belonging to class Amphibia and all algae, the process of fertilisation occurs externally, outside the organism’s body, in water.

Both reptiles and gymnosperms experience internal fertilisation.

(C) Amphibian and algae