Question

You are asked by your teacher to study the different parts of an embryo of a gram seed. Given below are the steps to be followed for the experiment:
I. Soak the gram seeds in plain water and keep them overnight.
II. Cut open the soaked seed and observe its different parts.
III. Take some dry gram seeds in a petri dish.
IV. Drain the excess water.
V. Cover the soaked seeds with a wet cotton cloth and leave them for a day.
The correct sequence of these steps is:
A. III, I, V, IV, II
B. III, I, II, IV, V
C. III, IV, V, I, II
D. III, I, IV, V, II

Answer 1

Hint:Most of the seeds need sufficient water to moisturize the seeds. The absorption of water by seed is called soaking, which causes the seed coat to swell and split.

Complete answer:
A seed is an embryo which is surrounded by a protective external cover. The seed formation is part of the seed plant reproduction process, the spermatophytes and the angiosperm and gymnosperm plants. After the fertilization by pollen and growth in the mother plant, seeds are the result of the matured ovule. The embryo is composed of the zygote and the seed covering of the ovule integuments. Seeds were an important development in gymnosperms and Angiosperm plant's reproduction and success compared to more primitive plants like mosses, ferns, and liverworts, which do not possess seeds, and which use water-dependent means to reproduce. Seed plants now dominate on land, in warm and cold climates, from woodland to grassland.

To study the different parts of an embryo of a gram seed, first we must take some dry gram seeds in a petri dish. Then soak the gram seeds in plain water and keep them overnight and drain the excess water. After that we must cover the soaked seeds with a wet cotton cloth and leave them for a day. Then cut open the soaked seed and observe its different parts. We can see the dicot seed that have seed coat and embryo. Thus, we can identify the different parts of gram seeds.

Thus, the correct answer is option D. i.e., III, I, IV, V, II.

Note:Seeds were an important development in gymnosperms and Angiosperm plant's reproduction and success compared to more primitive plants like mosses, ferns, and liverworts, which do not possess seeds, and which use water-dependent means to reproduce.