Describe the RNAi process? How does it act as method of cellular defense in organisms?

Q. Assertion :Retroviruses or transposons can be used in the process of RNAi. Reason: RNAi takes place in all eukaryotic organisms as a method of cellular defense.

Q. State a method of cellular defense which works in plant cell.

Q. Which of the following statements are correct regarding the process of RNA interference?
(i) This is used to prevent the infestation of protozoans.
(ii) It takes place in some eukaryotic and all prokaryotic organisms as a method of cellular defense.
(iii) The method involves silencing of a specific mRNA due to a complementary dsRNA molecule.
(iv) It is a novel strategy to produce pest-resistant plants.

Q. (a) What is meant by reproduction?
(b) What are the two general methods of reproduction in organisms?
(c) How does an Amoeba reproduce? Describe the process of reproduction in Amoeba with the help of labelled diagrams of different stages in its reproduction process.
(d) what is the name of the process by which Amoeba reproduces?
(e) Name two organisms which reproduce by the same asexual process as that of Amoeba.

Q.

What does Mrs. Jordan describe as 'a fatal mistake'? What is the irony in the comment she makes on Mrs. Slater's defense?