Virus free plants can be generated through-

Assertion : Yeasts such as Saccharomyces cerevisiae are used in baking industry.

Reason : Carbon dioxide produced during fermentation causes bread dough to rise by thermal expansion.

Long neck of camel is due to

Which is best represents cross breeding ?

In which the parthenogenesis is observed

Assertion : Cattle breeds can be improved by superovulaton and embryo transplantaion.

Reason : Superovulation in high milk-yielding cows is induced by hormonal injection.