The branch of science that studies cells is called

The correct answer is A. cytology.

Cytology is the branch of biology that studies cells. It is a sub-discipline of histology and it overlaps with other sub-disciplines of biology such as molecular biology, biochemistry, cell biology, and developmental biology.

Cytology is concerned with the structure, function, and behavior of cells. It also studies the processes that occur within cells, such as cell division, cell signaling, and cell death.

Cytology is a very important field of study because it helps us to understand how the human body works. It is also used in many different fields, such as medicine, biology, and agriculture.

Here is a brief explanation of each option:

• A. Cytology is the branch of science that studies cells. It is a sub-discipline of biology that deals with the structure, function, and behavior of cells.
• B. Homoplasty is the similarity of parts or organs in different organisms that is due to common ancestry.
• C. Entomology is the scientific study of insects.
• D. Hormonology is the study of hormones and their effects on the body.