Molecular basis of organ differentiation dpends on the modulation in transcription by

• RNA polymerase

• ribosome

• transcription factor

• transcription factor

In maize, hybrid vigour is exploited by

• bombarding the seeds with DNA

• crossing of two inbred parental lines

• harvesting seeds from the most productive plants

• harvesting seeds from the most productive plants

Which part of ovary in mammals acts as an endocrine gland after ovulation?

• Graaffian follicle

• Stroma

• Germinal epithelium

• Germinal epithelium

Geometric representation  of age structure is a characteristic of

• Biotic community

• Population

• Landscape

• Landscape

In cloning of cattle a fertillized egg is taken out of the mother’s womb and

• the egg is divided into 4 pairs of cells which are implanted into the womb of other cows

• in the eight cell stage, cells are separated and cultured until small embryos are formed which are implanted into the womb of other cow

• in the eight cell stage the individual cells are separated under electrical field for further development in culture media

• in the eight cell stage the individual cells are separated under electrical field for further development in culture media

One of the important consequences of geographical isolation is

• no change in the isolated fauna

• preventing speciation

• speciation through reproductive isolation

• speciation through reproductive isolation

Which one of the following statements is correct?

• Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies

• Both Azotobacter and Rhizobium fix atmospheric nitrogen in root nodules of plants.

• Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.

• Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and for plant nutrition in soil.

The concept of chemical evolution is based on

• cyrstallization of chemicals

• interaction of water, air and clay under intense heat

• effect of solar radiation on chemicals

• effect of solar radiation on chemicals

One of endangered species of Indian medicinal plants is that of

• Podophyllum

• Ocimum

• Garlic

• Garlic

Among the human ancestors the brain size was more that 1000 CC in

• Homo neander-thalensis

• Homo erectus

• Ramapithecus

• Ramapithecus