seeds

Correct answer: B. Seed

Correct answer: B, seed. To understand this, remember the main changes after fertilization in a flower. The ovule contains the female reproductive structures. After the male and female gametes fuse, the zygote develops into an embryo. The ovule protects and nourishes this developing embryo and becomes a seed. Its integuments usually form the seed coat, which protects the embryo. The ovary, however, develops into the fruit and surrounds or contains the seeds. Therefore, A, fruit, is related to the ovary, not directly to the ovule. C, petal, is a floral part that attracts pollinators and does not become a seed. D, style, is the stalk-like part of the carpel through which the pollen tube grows; it also does not change into a seed. Memory cue: ovule becomes seed, while ovary becomes fruit.

Correct answer: A. Integuments

The integuments are protective layers surrounding the ovule, and after fertilisation they generally harden and develop into the seed coat. The stigma receives pollen, the anther produces pollen, and petals may attract pollinators. These floral parts do not form the seed coat. Thus, the ovule’s integuments provide the direct structural origin of the seed coat.

Correct answer: B. Two

A dicot embryo has two cotyledons, which are embryonic leaves. Depending on the plant, they may store food or absorb nutrients from the endosperm during germination. The number of cotyledons is the basis for the terms dicot and monocot: a monocot embryo generally has one cotyledon. Therefore, two is the only correct option.