(iii) In golden rice two genes were taken from (a) Narcissus sp. (b) Erwinia (c) Oryza sativa (d) None of these
niharasajeev
Asked:
December 2022
Assertion: The method of development of embryo sac from a single functional megaspore is termed as monosporic development. Reason: In monosporic type of embryo sac development, usually the megaspore which is situated towards the micropylar end remains functional. (a) Assertion and Reason are true and Reason is the correct explanation...
niharasajeev
Asked:
December 2022
Assertion: Although geitonogamy is functionally cross-pollination involving a pollinating agent, genetically it is similar to autogamy since pollen grains come from the same parent. Reason: In geitonogamy, pollen grains from the anthers of one flower are transferred to the stigma on the same plant. (a) Assertion and Reason are true...
niharasajeev
Asked:
December 2022
Spermatogenesis starts at the age of puberty due to a significant increase in the secretion of GnRH. (a) What is the source of GnRH? (b) Explain the role of GnRH in spermatogenesis.
How does perisperm differ from pericarp?
niharasajeev
Asked:
December 2022
What is the site of microsporogenesis in angiosperms? Explain the role of two male gametes produced in the pollen tube.
niharasajeev
Asked:
December 2022
Assertion: Nuclear endosperm is formed by subsequent nuclear division without a wall formation. Reason: Coconut is an example of such endosperm that remains nuclear throughout the development of the fruit. (a) Assertion and Reason are true and Reason is the correct explanation of Assertion. (b) Assertion and Reason are true...