Short Answer TypeState what is apomixis. Comment on its significance. How can it be commercially used?
Long Answer Type(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.Short Answer TypeOut of many papaya plants growing in your garden, only a few bear fruits. Give reason.
Long Answer Type(a) Explain the post-pollination events leading to seed production in angiosperms.
(b) List the different types of pollination depending upon the source of pollen grains.
Short Answer TypeA. Draw a labelled diagram of L.S. of an embryo of grass (any six labels).
B, Give reason for each of the following:
(i) Anthers of angiosperm flowers are described as dithecous.
(ii) Hybrid seeds have to be produced year after year.
State the importance of water to plants.
Water is important for plants because of the following reasons:
(i) Water helps in the germination of seeds.
(ii) Water helps in the process of photosynthesis by which plants prepare their food.
(iii) Water helps in the transport of nutrients and minerals from the soil to the plants.
(iv) Water helps in the maintenance of the plant structure by providing the appropriate pressure to the plant tissues
(v) Water provides habitat in the form of ponds, rivers, lakes and sea for a large number of plants.
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