Dicot root differs from monocot root in one of the following
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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