MCQs of Biology – Baccilariophyta

Which organisms are sometimes called the ” pastures of the sea”?

Diatoms belong to:

Which one of the following is representing the group of diatoms?

Diatoms are found in:

Centric discoid form of diatoms is:

Microfossile often present in petroleum producing formationsare those of:

Cell wall is richly impregnated with silica in:

The cell wall is usually composed of two overlapping halves called epitheca and hypotheca in:

Unlike other algae, diatoms do not readily decay due to:

Cell wall is extremely well preserved in fossil specimens in:

Fine geometric expression and beautiful sculpturing cell wall is found in:

Empty diatom cells are called:

Diatom frustule/ shell is made of:

The chloroplasts of diatoms and chrysophycean algae do not possess:

Oil body is found in the cells of:

Diatoms stay afloat due to:

Diatomaceous earth is used for making:

Diatoms exhibit:

Locomotion in diatoms is by:

Locomotion in diatoms is carried out with the help of:

Golden brown colour of diatoms is due to presence of:

Diatoms float of the surface of water as their cells have:

Characteristic spores of diatoms are:

In diatoms, auxospores are produced during:

Auxospores of diatoms are:

A diatom cell produces how many auxospores?

Starospores are produced by:

Kisegurh is infact:

Brown colour of diatoms is due to predominance of:

Diatomin is a: