8. The photo shows a flower of the pomegranate some time after fertilization. Id

Question

8. The photo shows a flower of the pomegranate some time after fertilization. Identify the parts shown. d. (2x). 9. Some biologists contend that the term double fertifization is a misnomer and that the process should be called fertilization and tripe fusion Why do they argue that the fusion of the one sperm nucleus and the two polar nuclei is not fertilization? Food for Thought 10. Your roommate says that you need vegetables and asks you to pick up tomatoes at the store. To your room- mate's surprise, you say a tomato is not a vegetable, but a fruit. Explain. eod Plants it: Anghesperes 33s

Explanation / Answer

Ans. #8. a. Persistent calyx,

            b. Stamen cluster

            c. Seeds/Aril (the edible parts); OR- membrane (yellowish, papery structures). The picture is not clear. So, choose the correct option.

            d. Leathery exocarp/ skin/ rind

#9. Fertilization is the process of fusion of sperm with an egg to produce diploid zygote, which further develops into whole organism through embryogenesis and subsequent developments.

Fusion of one sperm nucleus with two polar nuclei is NOT fertilization because-

I. The sperm does not fuse with an egg, but fuses with polar nuclei.

II. The fertilization of polar nuclei with sperm does not produce a diploid zygote. Instead it produces triploid endosperm.   

#10. The fruit is a mature ovary generally developed after fertilization of the egg. Because of its development from ovary, it generally contains seeds (except in parthenocarpic fruit).

# The edible parts of a plant, except those developed from ovary, are called vegetables. They don’t contain seeds. For example- leafs, roots, stems, etc.

# Since tomato develops from ovary, it’s a fruit.

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