Biology Mcqs

Cell wall is richly impregnated with silica in__________?

A. Rhodophyta
B. Phaeophyta
C. Baciliariophyta
D. Euglenophyta

Microfossile often present in petroleum producing formationsare those of__________?

A. Diatioms
B. Heliozoans
C. Radiolarians
D. Foraminiferans

Centric discoid form of diatoms is__________?

A. Diplaneis
B. Coscinodiscus
C. Camphyloneiscus
D. Stephanodis

Diatoms are found in__________?

A. Phytoplanktonic population
B. Freshwater lakes and ponds
C. Marine environment
D. All of the above

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

A. nularia, Navicula, Cymbella, Melosira
B. Euglenamorpha, Hedneria , Heteronema, Colacium
C. Nostoc, Anabaena, Aulosira, Cylindrospermum
D. Cochlodinium, Gymnodinium, Lenodinium, Peridinium

Diatoms belong to___________?

A. Chrysophyta
B. Bacillariophyceae
C. Xanthophyceae
D. Both A. and B.

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

A. Diatoms
B. Radiolarians
C. Dinoflagellates
D. Foraminiferans

The wax present on the body of cockroach is secreted:

A. Mucocytes
B. Leucocytes
C. Oenocytes
D. Granulocytes

The bristles on the body of the cockroach arise from__________?

A. Epidermis
B. Trichogen cell
C. Basement membrane
D. Malpighian cell

Melanin pigment in cockroach is found in__________?

A. Epicuticle
B. Exocuticle
C. Endocuticle
D. All of these