Question

Part of sperm that passes into the ovum is?
(A) Tail
(B) Acrosome
(C) Head
(D) Head, neck, and the middle piece

Answer 1

Hint: A spermatozoon consists of four parts: head, neck, middle piece, and tail.
Head- Contain nucleus and acrosome
Neck- Contain two centrioles
Middle piece- Contain mitochondria, Tail

Complete answer:
Option (A) Tail
The sperm tail is a thin, long structure that makes up about 80 percent of the entire length of the sperm. While the tail may seem to be one long continuous structure, it is divided into several parts that include:
Connecting piece – This is the part that attaches the flagellum to the sperm head
Midpiece - It includes mitochondria and thus gave the energy required for movement
Principal piece (axial filament)
End piece. The principal piece and the end piece of the flagella help for movement. The tail of the sperm degenerates while entering the egg.

Option (B) Acrosome
The acrosome and acrosomal cap make up the acrosomal region which is formed during spermiogenesis, the acrosome is the product of the Golgi complex and comprises a number of contents such as acrosin enzymes in the acrosomal matrix.
The acrosome occupies the space between the interior plasma membrane and the nuclear membrane.
The acrosome plays an important role in fertilization. For instance, with a number of its associated molecules, the acrosome is involved in the recognition of the egg to be fertilized.

Option(C) Head
The sperm head has a smooth and oval shape. The head section also corresponds to an egg due to its broad base and narrowing apex. The head is the most important part of the cell given that it contains the nucleus with genetic material with 23 chromosomes required to form a new offspring.

Option (D) Head, Neck, and the middle piece
The egg covers around the entering sperm finger-like processes called microvilli which constitutes a fertilization cone. The latter takes the entire sperm into the egg and where the tail degenerates.

So the correct answer among the following options is Option (D) Head, Neck, and middle piece.

Note: Sperm also called spermatozoon, plural spermatozoa, male reproductive cell, produced by most animals. The sperm fertilizes an ovum (egg) of the female to produce a new offspring. Mature sperm have two distinguishable parts, an ahead, and a tail.