Question

Each cell of Volvox colony has a structure similar to
A) Ulothrix
B) Spirogyra
C) Chlamydomonas
D) Bostic

Answer 1

Hint:-Volvox is a green coloured algae that forms its colonies. The arrangement of a volvox colony is known as a coenobium. The coenobium is a motile colony which moves with the help of the flagella.

Complete Answer:-
Volvox belongs to the family volvocaceae. Each family of volvox contains about fifty thousand cells. The colonies are hollow and spherical. It is a typical freshwater alga.
Chlamydomonas is also an alga and is unicellular. It bears a flagellum which makes it Capable of moving from one place to another. Chlamydomonas may be found in all parts of the world- From freshwater to Salt Lake to hilly areas to plains to plateaus and even mountain tops.
It is oval with a Cup-shaped chloroplast. Due to the presence of the chloroplast which contains chlorophyll, it can make its food. Its size is about 10 micrometres. The Chlamydomonas Cell wall contains multiple layers. The nutrients are absorbed into the cell through the cell wall. The waste materials that are produced by the cell are also removed by diffusion across the cell wall.
The cells of the volvox colony, coenobium, resemble Chlamydomonas which is a unicellular organism specifically algae.
Thus, the right option is C.

Note:- Chlamydomonas is used to study the flagellar motility. It has a haplontic life cycle. Earlier, Chlamydomonas was placed in kingdom Plantae because it is green in colour and can synthesize its food.