Question

Define the following:
(i) Embryo
(ii) Exalbuminous seed
(iii) Germination (iv) Seed dormancy​

Answer 1

Answer:

i) a baby, an animal or a plant in the early stages of development before birth.

ii) Exalbuminous seeds are the seeds which have the stored food and the cotyledons in a special structure called as kernel. It does not remain until the embryo is mature.

iii) Germination is the process by which an organism grows from a seed or similar structure.

iv) Dormancy is when there is a lack of germination in seeds or tubers even though the required conditions (temperature, humidity, oxygen, and light) are provided. Dormancy is based on hard seed coat impermeability or the lack of supply and activity of enzymes (internal dormancy) necessary for germination.

Answer 2

Answer:

Your ans will be:

(i) An embryo is the early stage of development of a multicellular organism. ... A newly developing human is typically referred to as an embryo until the ninth week after conception, when it is then referred to as a fetus.

(ii) At maturity, seeds of these species have no endosperm and are termed exalbuminous seeds. Some exalbuminous seeds are bean, pea, oak, walnut, squash, sunflower, and radish. Seeds with an endosperm at maturity are termed albuminous seeds.

(iii) Germination is the growth of an embryonic plant contained within a seed; it results in the formation of the seedling. Steps in Seed Germination - The seed coat splits. - A tiny root grows downwards and a shoot grows upwards. - This produces a seedling of a plant, which ultimately grows into a new plant

(iv) . Seed dormancy is an evolutionary adaptation that prevents seeds from germinating during unsuitable ecological conditions that would typically lead to a low probability of seedling survival.

Hope so it will help you....✌️