(a) Explain the different ways apomictic seeds can develop. Give an example of each.
(b) Mention one advantage of apomictic seeds to farmers.
(c ) Draw a labelled mature stage of a dicotyledonous embryo.

(a) Explain one application of each one of the following : (A) Amniocentesis. (B) Lactational amenorrhea. (C) ZIFT. (b) Prepare a poster for the school programme depicting the objectives of : "Reproductive and Child Healthe C are Programme." OR (a) Explain any two ways by which apomictic seed can develop. (b) List one advantage and one disadvantage of a apomictic crop. (c) Why do farmers find production of hybrid seeds costly ?

Why are some seed referred to as apomictic seeds ? Mention one advantage and one disadvantage to a farmer who uses them.

(a) Give one example of addition homopolymer. (b) Mention one use each of LDP and HDP. (c) What is the monomer unit of natural rubber ?

(a) What type of linkage is present in proteins ? (b) Give one example each of water soluble and fat soluble vitamins. (c ) Draw pyranose structure of glucose.

(a)Give one point of difference betweeen an atoms and an ion. (b)Give one example of each of polyatomic cation and a polyatomic anion. (c )Identify the correct name of FeSO_(3) from the given names-Ferrous sulphate, Ferrous sulphide, Ferrous sulphite. (d)Write the chemical formulae for the chloride the magnesium.

(a) How are Parthenocarpic fruits produced by some plants and apomictic seeds by some others ? Explain. (b) When do farmers prefer using apomictic seeds ?

(a) Trace the development of embryo after syngamy in a dicot plant. (b) Endosperm development precedes embryo development. Explain. (c ) Draw a diagram of a mature dicot embryo and label cotyledons , plumule, radicle and hypocotyl in it.

(a) Define geotropism. Give one example of geotropism. (b) What is meant by 'positive geotropism' and negative geotropism? Give one example of each type. Draw a labelled diagram to illustrate your answer indicating the plant part which shows positive geotropism and the plant part which shown negative geotropism. (c) Name one plant part which exhibits positive thigmotropism.

A farmer harvests his crop and expresses his harvest in three different ways. (a) I have harvested 10 quintals of wheat. (b) I have harvested 10 quintals of wheat today in one acre of land. (c) I have harvested 10 quintals of wheat in one acre of land, 6 months after sowing. Do the above statements mean one and the same thing. If your answer is ‘yes', give reasons. And if your answer is ’no’ explain the meaning of each expression.

(a) what are the three general classes of matter ? Give one example of each type. (b) Draw a flow-chart for the schemtic resestation of different types of matter.