Microfossile often present in petroleum producing formationsare those of__________?
A. Diatioms
B. Heliozoans
C. Radiolarians
D. Foraminiferans
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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. Pinnularia, 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
Chitin in cockroach is absent in____________?
A. Epicuticle
B. Exocuticle
C. Endocuticle
D. All of these