Question

Perisperm differs from endosperm in
A.Having no reserve food
B.Being a diploid tissue
C.Its formation by fusion of the secondary nucleus with several sperms
D.Being a haploid tissue

Answer 1

Perisperm is the nutrient tissue that covers the embryo in some seeds and grows from the nucleus of the ovule. The endosperm is a tissue formed within the seeds of most flowering plants after double fertilisation.

Complete answer:
A few plant seeds show two types of food storage tissue namely Perisperm and Endosperm. Stored foods are found in seeds in the form of proteins, fats and carbohydrates. The differentiating factor between the two tissues is that the perisperm is diploid that emerges from the nucleus, while the endosperm is triploid that emerges from triple fusion. The seed endosperm consumes nutrients from the perisperm and converts it into an embryo. Triple fusion produces the endosperm nucleus within the embryo bag. During this fusion, the three haploid nuclei will combine to create the triploid nucleus in endosperms. The other differences between perisperm and endosperm are as below.

S.No	Perisperm	Endosperm
1	Perisperm emerges from the nucleus.	Endosperm emerges from the nucleus of the main endosperm.
2	The chromosomes have diploid cells	Here, the chromosomes have triploid cells
3	Perisperm surrounds the endosperm	Endosperm surrounds the embryo.
4	It is generally dry in nature	It is wet in nature
5	Perisperm is present only in plant families such as Caryophyllaceae, Amaranthaceae, Portulacaceae, Zingiberaceae, etc.	Endosperm occurs in all types of plants
6	Examples: Coffee, black pepper, sugar, beet	Examples: Tomato, groundnut, cereal grains

Hence, the correct answer is option (B)

Note: When the seed germinates, the stored food is used during embryonic development. The endosperm gets dissolved during the seedling process.