Biology Mcqs

Empty diatom cells are called___________?

• (A)  Raphe
• (B)  Valves
• (C)  Frustule
• (D)  Girdles

Answer

Submitted By :Ali Uppal

Cell wall is extremely well preserved in fossil specimens in__________?

• (A)  Diatoms
• (B)  Dinoflagellates
• (C)  Slime moulds
• (D)  None of these

Answer

Submitted By :Ali Uppal

Unlike other algae, diatoms do not readily decay due to___________?

• (A)  Nonliving cells
• (B)  Siliceous wall
• (C)  Mucilaginous wall
• (D)  Water proof cell

Answer

Submitted By :Ali Uppal

The cell wall is usually composed of two overlapping halves called epitheca and hypotheca in__________?

• (A)  Diatoms
• (B)  Desmids
• (C)  Pyrrophyta
• (D)  Chlorophyta

Answer

Submitted By :Ali Uppal

Cell wall is richly impregnated with silica in__________?

• (A)  Rhodophyta
• (B)  Phaeophyta
• (C)  Baciliariophyta
• (D)  Euglenophyta

Answer

Submitted By :Ali Uppal

Microfossile often present in petroleum producing formationsare those of__________?

• (A)  Diatioms
• (B)  Heliozoans
• (C)  Radiolarians
• (D)  Foraminiferans

Answer

Submitted By :Ali Uppal

Centric discoid form of diatoms is__________?

• (A)  Diplaneis
• (B)  Coscinodiscus
• (C)  Camphyloneiscus
• (D)  Stephanodis

Answer

Submitted By :Ali Uppal

Diatoms are found in__________?

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

Answer

Submitted By :Ali Uppal

Which of the following organ is responsible for blood filtration:

• (A)  Liver
• (B)  Kidney
• (C)  Lungs
• (D)  Heart

Answer

Submitted By :Ali Uppal

Which one of these is a set of useful insects?

• (A)  Sandfly , butterfly, hoeybee
• (B)  Sikmoth, honeybee, locust
• (C)  Honeybee, silkmoth, tsetse fly
• (D)  Honeybee , lac insect, cochineal insect

Answer

Submitted By :Ali Uppal