If the culture is kept in stationary phase for a prolonged period, the cells may die. Why?

a) due to the time taken for doubling of cell number

b) duration of a cell generation is too large, depending mainly on the plant species.

c) stationary phase is forced on the culture by a depletion of the nutrients

d) due to an accumulation of cellular wastes

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#Question id: 3483

#SCPH28 | Zoology

Which of the following statements about evolution of behavior is correct?

A) Natural selection will favor behavior that enhances survival and reproduction.

B) An animal may show behavior that maximizes reproductive fitness.

C) If a behavior is less than optimal, it is not completely evolved but will eventually,become optimal.

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#Question id: 2337

#SCPH06 I Botany

Centrioles may have originated as

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#Question id: 16496

#SCPH28 | Zoology

Neomycin phosphotransferase  gene is used as a selectable marker. It provides resistence against which antibiotic ?

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#Question id: 92

#SCPH06 I Botany

Monosaccharide derivatives in which an amino group replaces one of the hydroxyl groups may have important roles in

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#Question id: 15209

#SCPH28 | Zoology

Agarose gels are formed by suspending dry agarose in aqueous buffer, in which usually Agarose concentration between