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Dicot root differs from monocot root in one of the following
Which of the following is considered as a universal solvent ?
Cross between a homozygous black rough (BBRR) guinea pig and a homozygous white smooth guinea pig (bbrr) produced F1 progeny all black and rough. Assuming that the black colour is dominant over white skin and rough skin is dominant over smooth skin and the two genes involved are present on different chromosomes. The percentage of F2 individuals which are heterozygous for both the gene pairs would be :
Percentage of heterozygous individuals obtained from selfing Rr individuals is :
A person has developed interferon in his body. He seems to carry infection of
Which one of the following substances plays an important role in biochemical defence of host plants?
Tissue culture technique can produce indefinite number of new plants from a small parental tissue. The economic importance of the technique is in raising.
Elongated lignified cells with pointed end walls belong to
The sperm penetrates the egg by means of enzymes that are found in the
One of the following plant turns to a brown ball during drought (adapted to drought) but turns green just with the first shower
Dark coloured Peppered Moth is able to survive in industrial areas as compared to light coloured form because of
"Human population grows in geometric ratio while food materials increase in arithemetic proportion." It is a statement from
Which of the following would increase as ADH levels rise?
Which hormone is released when the salt concentration in the blood increases?
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