(i) Define the term Mutation.
(ii) A pure breeding red flower variety of pea plant (RR) is crossed with a pure breeding white flower variety of pea plant (rr). Draw a Punnett square to find out the Phenotypic and Genotypic ratios of the progeny belonging to the F2 generation.
(iii) Leaves of certain plants roll up on a hot sunny day. Explain by giving suitable reasons.
(iv) What is a semi permeable membrane? Name the semi permeable membrane present in a plant cell.
(v) The diagram below depicts the human heart in one of its phases. Answer the questions that follow:

(a) Which part of the heart is in the contraction phase?
(b) Give a suitable reason to justify your answer in (a).
(c) Distinguish between Systole and Diastole

Solution

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