The best description on natural selection is

• The reproductive success of the members of a population best adapted to an environment

• It acts when the resources are unlimited

• A change in the proportion of variations within a population

• It follows Hardy-Weinberg principle

Golden ages of reptiles and fishes are respectively

• Mesozoic and Devonian

• Jurassic and Permian

• Triassic and Silurian

• Palaeozoic and Mesozoic

Which one of the following in birds indicates their reptilian ancestry?

• Scales on their hindlimbs

• Four-chambered heart

• Two special chambers crop and gizzards in their digestive tract 

• Egg with a calcareous shell

Which of the following is the most primitive ancestor of man?

• Ramapithecus

• Homo habilis

• Australopithecus

•  Homo sapiens neanderthalensis

The term ‘prebiotic’ soup’ for organic water containing mixture of simple organic compounds was given by

• Richter

• Haldane

• Arrhenius

• Miller

Which one of the following human ancestors is known as tool maker?

• Homo erectus

• Java man

• Homo habilis

• Heidelberg man

Darwins finches represent

• Morphological variations

• Geographical isolations

• Climate variations

• Reproductive isolation

Darwinism explains all the following except

• Within each species, there are variations

• Organisms tend to produce more number of offspring that can survive

• Offspring with better traits that overcome competition are best suited for the environment

• Variations are inherited from parents to offspring through genes

Theory of pangenesis was given by

• Darwin

• Lamarck

• Hugo de Vries

• Oparin

Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination and

• Evolution

• Limiting factors

• Saltation

• Natural selection