Long Answer Questions
“Incompatibility is a natural barrier in the fusion of gametes.” Justify the statement.

Long Answer Questions Write an essay on the development of female gametophyte. Illustrate the answer with suitable diagrams.

True and False Type Questions Sexual reproduction always involves the fusion of gametes of male and female parents.

Long Answer Questions Write a note on the development of endosperm. Mention the types with examples.

SHORT ANSWER TYPE QUESTIONS Does self-incompatibility impose any restrictions on autogamy? Give reasons and suggest the method of pollination in such plants?

Short Answer Questions Three mark : What is triple fusion? Where and how does it take place? Name the nuclei involved in triple fusion.

Long Answer Questions Draw a well-labelled diagram of a mature ovule, showing its internal structure.

With the reference to the following figure of stages of a microspore maturing into a pollen grain, answer the question. How many meiotic divisons occurs in the formation of two male gametes ?

True and False Type Questions The fusion of germ cells leads to the formation of male gametes.

ASSERTION TYPE QUESTIONS : These questions consist of two statements each, printed as Assertion and Reason. While answering these questions, you are required to choose any one of the following four responses. A. If both Assertion and Reason are true and Reason is correct explanation of Assertion B. If both Assertion and Reason are true but Reasou is not correct explanation of Assertion. C. If Assertion is true but Reason is false. D. If both Assertion and Reason are false. Assertion : Asexual reproduction is also called blastogenesis. Reason: In asexual reproduction, there is no formation and fusion of gametes.