Question
XYZ system of hybrid seed production in wheat was
proposed by:Solution
The principle of the XYZ system was published by Driscoll (1972). It uses an addition chromosome carrying a gene for pollen fertility and a gene for a phenotype marker – blue coloured aleurone layer.
A ridge on a seed formed by the fusion of the funicle to the seed coat is called:
Among the options given below, which of the following fishes possess electric organ?
Match List I with List II
Choose the correct answ...
Which of the following given options, the cellular and molecular control of programmed cell death called?
4 'A' model of rural marketing includes:
Which insect pest exhibits a behavior of moving in an army, destroying fields, and feeding voraciously on all types of vegetation?
Which element constitutes the highest percentage in the Earth’s crust?
 ‘Mehsana’ breed belongs to the species:
Which of the following insect orders contains species that are exclusively parasitic in behavior?
In plants a common symptom caused by deficiency of P, K, Ca and Mg is the:
