Final answer:
An ovule's tough coat protects the embryo. The ovary transforms into fruit after fertilization, while petals and other parts of the flower often fall off. Germination refers to the growth of an embryo within a seed into a new plant under appropriate conditions.
Step-by-step explanation:
(a) The ovule develops a tough coat to protect the embryo inside. This coat is crucial because it helps to prevent desiccation or drying out, and also shields the embryo from mechanical injuries or infections.
(b) The ovary develops into the fruit. After fertilization, the ovary, which houses the ovule, grows and ripens, transforming into a fruit. This fruit can serve to protect the seeds and assist in their dispersal.
(c) The petals, sepals, and stigma, parts of the flower that served in pollination, commonly shrivel and fall off after the fertilization process. They have fulfilled their function, and are no longer needed.
(d) Germination is the process by which the embryo within the seed develops into a new plant under appropriate conditions. This includes the presence of water, oxygen, and suitable temperatures for growth.
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