Question

A thin layer of cytoplasm found in the middle piece of sperm is known as ____ ?
(a) Fourchette
(b) Nebenkern sheath
(c) Acrosome
(d) Manchette

Answer 1

In the middle piece of the sperm, there are many mitochondria present to supply energy to the sperm for movement. Because the middle portion is totally crammed with the mitochondria, the cytoplasm forms a spiral sheath-like structure around mitochondria which is understood as Nebenkern sheath.

Complete answer:
A spermatozoon pronounced, alternate spelling spermatozoon, plural spermatozoa, from Ancient Greek and Ancient Greek may be a motile sperm or moving sort of the haploid cell that's the male gamete. A spermatozoon joins an ovum to make a zygote. (A zygote may be a single cell, with an entire set of chromosomes, that normally develops into an embryo.
Sperm cells contribute approximately half the nuclear genetic information to the diploid offspring (excluding, in most cases, mitochondrial DNA). In mammals, the sex of the offspring is decided by the sperm cell: a spermatozoon bearing an X chromosome will cause a female (XX) offspring, while one bearing a Y chromosome will cause a male (XY) offspring. Sperm cells were first observed in Antonie van Leeuwenhoek's laboratory in 1677.
The human sperm is that the germ cell in males and can only survive in warm environments; once it leaves the human body the sperm's survival chances are reduced and it's going to die, thereby decreasing the entire sperm quality. Sperm cells are available in two types, "female" and "male".

Hence the correct option is (B).

Note: The differentiation of the spermatids into sperm cells is called spermiogenesis. It corresponds to the ultimate part of spermatogenesis and comprises the subsequent individual processes that partially proceed at an equivalent time.