B PLUSTOPPER

  1.    Name two processes essential for sexual reproduction to take place. Answer: - Sexual reproduction is the process which results in the creation of a new organism by combining the genetic material of two organisms. The two main processes involved in sexual reproduction are meiosis and fertilization. (a) Meiosis: It is a process in which the number of chromosomes is halved (2n to n) and haploid gametes are formed. (b) Fertilization: It is a process in which the male gamete fuses with the female gamete to form diploid zygote. It restores the number of chromosomes (2n). 2.    What do you understand by the term dichogamy? Answer: - The production of male and female reproductive elements at different times by a hermaphroditic organism in order to ensure cross-fertilization. 3.    Give the meaning of hydrophily. Answer: - Pollination of flowering plants by water is known as hydrophily. Example of hydrophily plants is: Vallisneria and zoostera . 4.    State the feat

  D. Practice Paper-13 Question 4 (a) Give the meanings of the following words as used in the passage: One word answers or short phrases will be accepted. (i). Disgraceful (line 5) .... ................................................................ . Ans. dishonourable (ii). Portable (line 7 ) ..................................................................... Ans. easy to car ry . (iii). embedded (line 2 3 ) .. ............................ Ans. Enveloped . (b) Answer the following questions briefly in your own words. (i). Who was Wilfrid as referred to in the first paragraph? How was he popularly known and why? Ans. Wilfrid, ref erred to in the first paragraph was Wilfrid Pigeoncote, who had inherited an estate from his uncle. He was popularly known as Wilfrid, the Snatcher because of his urge to steal . (ii). Why were the Pigeoncotes feeling awkwar d while entertaining their gust? Ans. Pigeoncotes were feeling awkward while entertaining