Which one of these is an insect?

A. Mite
B. Spider
C. Moth
D. Scorpion

A moth is closely related to_________?

A. Wasp
B. Beetle
C. Cricket
D. Butterfly

Diatoms stay afloat due to___________?

A. Flagella
B. Stored lpids
C. Pseudopodia
D. All of these

Diatomaceous earth is used for making __________?

A. Fertilizers
B. Weedicides
C. Insecticides
D. Fire proof bricks

Locomotion in diatoms is carried out with the help of__________?

A. Valve
B. Raphe
C. Pseudopodium
D. Cilia or flagella

The chloroplasts of diatoms and chrysophycean algae do not possess____________?

A. Chloryphyllpigments
B. Enzymes for photolysis
C. Defined grana and stroma
D. Carotenes with chlorophylls

Oil body is found in the cells of___________?

A. Diatoms
B. Slime moulds
C. Chlorophycean forms
D. None of the these

Cell wall is extremely well preserved in fossil specimens in__________?

A. Diatoms
B. Dinoflagellates
C. Slime moulds
D. None of these

Empty diatom cells are called___________?

A. Raphe
B. Valves
C. Frustule
D. Girdles

Diatom frustule/ shell is made of_____________?

A. Silica
B. Calcium carbonate
C. Manesium carbonate
D. Both b. and c.