Question

What is the difference between spermatids and spermatozoa?

Answer 1

Hint: Spermatids are the cells which are produced from the testes as a result of spermatogenesis. The spermatids develop into spermatozoa or sperms by the process of spermiogenesis.

Complete answer:
The seminiferous tubules in the testes produce male sperm cells. The process of spermatogenesis involves the mitotic division to the spermatogonia (2n) followed by the meiosis 1 and 2 leading to the primary and secondary spermatocytes yielding haploid spermatids. This spermatid develops into sperm cells.
 

Let us discuss the difference between spermatids and spermatozoa.

Spermatid	Spermatozoa
These are the immature male sperms formed from spermatogonia through meiosis	They are mature and differentiated and formed by the process of spermiogenesis.
They are round in shape.	These are elongated with a tail.
They are found near to the walls of the seminiferous tubules.	They are present at the middle of the seminiferous tubules.
They possess golgi.	Lack of golgi apparatus.
They are not capable of fertilising an egg.	They are capable of fertilising the egg.
They have large and round nuclei.	The nucleus is round and elongated.
They are immobile.	They are capable of moving.
The mitochondria is present throughout the cell.	The mitochondria is present at the middle piece which provides energy for the mobility.

Note:
The spermatozoa is ejaculated along with the semen during coitus. The sperm travel through the female reproductive tract and reach the fallopian tube where it fertilises with the egg and forms zygotes.