What will happen if the stretch receptors of the urinary bladder wall are totally removed?
Options
(a) Micturition will continue (b) Urine will continue to collect normally in the bladder (c) There will be […]
Adaptive radiation refers to
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(a) evolution of different species from a common ancestor (b) migration of members of a species to different geographical areas (c) power of adaptation in an individual to […]
The idea of mutations was brought forth by
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(a) Gregor Mendel, who worked on Pisum sativum (b) Hugo de Vries, who worked on evening primrose (c) Hardy Weinberg, who worked on allele […]
The concept of chemical evolution is based on
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(a) interaction of water, air and clay under intense heat (b) effect of solar radiation on chemicals (c) possible origin of life by combination […]
Industrial melanism as observed in peppered moth proves that
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(a) the melanic form of the moth has no selective advantage over lighter form in industrial area (b) the lighter-form moth has no […]
Which one of the following statement is correct?
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(a) There is no evidence of the existence of gills during embryogenesis of mammals (b) All plant and animal cells are totipotent (c) Ontogeny […]
Which one of the following options gives one correct example each of convergent evolution and divergent evolution?
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(a) Eyes of octopus and mammals – Bones of forelimbs of vertebrates (b) Thorns of […]
The extinct human who lived 1,00,000 to 40,000 years ago in Europe, Asia and parts of Africa, With short stature, heavy eyebrows, retreating fore heads, large jaws with heavy teeth, stocky bodies, a lumbering gait […]
The eye of octopus and eye of cat show different patterns of structure, yet they perform similar function. This is an example of
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(a) Homologous organs that have evolved due to divergent […]
Random unidirectional change in allele frequencies that occurs by chance in all populations and especially in small populations is known as
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(a) Mutation (b) Migration (c) Natural selection (d) Genetic drift
Correct […]
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