Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the F₂ segregation will show
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(a) segregation in […]
Increased asthmatics attacks in certain seasons are related to
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(a) eating fruits preserved in tin containers (b) inhalation of seasonal pollen (c) low temperature (d) hot and humid environment
Correct Answer:
inhalation of […]
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 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 is a matching pair of a body feature and the animal possessing it?
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(a) Ventral central nervous system – Leech (b) Pharyngeal gill slits absent in embryo- […]
In which one of the following the BOD (Biochemical Oxygen Demand) of sewage(s), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order ?
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Feeling tremors of an earthqake a scared resident of seventh floor of a multistored building starts climbing down the stairs rapidly. Which hormone initaited this action?
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(a) adrenaline (b) glucagon (c) gastrin […]
A person is having problems withy calcium and phosphorus metabolism in his body. Which one of the following glands may not be functioning properly?
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(a) parotid (b) Pancreas (c) Thyroid (d) Parathyroid
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