Question

Endospermic seeds are found in.
(А) Castor
(B) Barley
(C) Coconut
(D) All of these

Answer 1

Hint: Endosperm is that the tissue that's produced inside the seed, which we will see within the most of the flowering plants, the endosperm is typically triploid in nature, it contains all the nutrients, where it surrounds the embryo and provides the nutrition to the embryo within the sort of starch.

Complete Answer:
- Endosperm acts as the food storing tissue of a seed. it's produced as an outcome of double fertilization in angiosperms.
- In most monocots and a few dicot seeds, the food reserve stays within the endosperm. they're referred to as endospermic or albuminous seeds, e.g., maize, wheat, oilseed, coconut, barley, rubber.
- Though in most of the dicot seeds (e.g., orchids, Sagittaria), the endosperm is expended during seed improvement, and therefore the food is stored in cotyledons and other areas. they're called non endospermic or exalbuminous seeds.

Attributes of Endospermic seeds are:
- In endospermic seed, the endosperm is out there.
- Food isn't accumulated in cotyledons.
- The cotyledons are slender and papery.
- Perisperm doesn't produce from nucellus.
- Suspensor, haustoria don't replace the endosperm.

Endosperm is developed by either of three ways:
1. Nuclear endosperm formation - repeated free- nuclear divisions occur, cell membrane formation is observed after free-nuclear divisions. The endosperm produced is present as liquid endosperm. Example- coconut milk.
2. Cellular endosperm formation - cell-wall is made simultaneously with nuclear divisions. Acorus is an example of cellular endosperm development.
3. Helobial endosperm formation - two nuclei are formed which are divided by a cell membrane after which one half develops into endosperm. Most monocots have this sort of endosperm development.

Hence the correct answer is option D.

Note: In most of the endosperm, the food is within the sort of stored starch, whereas in some seeds like castor, it's in fat form, and endosperm also ready to produce some hormones like Cytokinins and helps within the cell differentiation. An example of seeds which lack the endosperm are orchid seeds.