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

Industrial melanism as observed in peppered moth proves that

• The true black melanic forms arise by a recurring random mutation.

• The melanic form of the moth has no selective advantage over lighter form in industrial area

• The lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area

• The lighter-form moth has no selective advantage either in polluted industrial area or non-polluted area

About 98 percent of the mass of every living organism is composed of just six elements including carbon, hydrogen, nitrogen, oxygen and

• phosphorus and sulphur

• sulphur and magnesium

• magnesium and sodium

• magnesium and sodium

The finches of Galapagos islands provide an evidence in favour of

• special creation

• evolution due to mutation

• retrogressive evolution

• retrogressive evolution

Which one of the following statement is correct?

• Stem cells are specialize cells

• There is no evidence of the existence of gills during embryogensis of mammals

• All plant and animal cells are totipotent

• All plant and animal cells are totipotent

36.

What is common to whale, seal and shark?

• Seasonal migration

• Thick subcutaneous fat

• Convergent evolution

• Convergent evolution

Adaptive radiation refers to

• adaptations due to geographical isolation

• evolution of different species from a common ancestor

• migration of members of a species to different geographical areas

• migration of members of a species to different geographical areas

When two species of different genealogy come to resemble each other as a result of adaptation, the phenomenon is termed

• divergent evolution

• microevolution

• co-evolution

• co-evolution

Which one of the following amino acids was not found to be synthesized in Miller's experiment?

• Glycine

• Aspartic acid

• Glutamic acid

• Glutamic acid

An important evidence in favour of organic evolution is the occurrence of

• homologous and vestigial organs

• analogous and vestigial organs

• homologous organs only

• homologous organs only