Ecologist has proposed following explanation to lead biodiversity at tropic.

a) Higher productivity in the tropics allows for more species

b)  Environments are more stable and predictable in the tropics, with fairly constant temperatures and rainfall levels year-round

c) Predators and pathogens limit competition in the tropics, which allows more species to coexist

d) High evolutionary speed at tropic than temperate

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#Question id: 19849

#SCPH05 I Biotechnology

Warming ammonium chloride with sodium hydroxide in a test tube is an example of :

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#Question id: 3642

#SCPH28 | Zoology

Any piece of DNA which replicates as a single unit is called

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#Question id: 14273

#SCPH05 I Biotechnology

Nicotiana tabacum cells are cultured to high density for production of polysaccharide gum. The reactor used is a stirred tank, containing initially 100 litres medium. The maximum specific growth rate of the culture is 0.18 d^-1 and the yield of biomass from substrate is 0.5 g g^-l. The concentration of growth-limiting substrate in the medium is 3% (w/v). The reactor is inoculated with 1.5 g l^{- 1} cells and operated in batch until the substrate is virtually exhausted; medium flow is then started at a rate of 4 l d^-1. Fed-batch operation occurs under quasi-steady-state conditions. Estimate the batch culture time.                                  ____________________

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#Question id: 1016

#SCPH06 I Botany

Lyme disease is an example of a disease

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#Question id: 18378

#I Life Science/ Life Sciences Group – I-V

Biostimulation is a process which involves the modification of the environment to