Which of the following is true about the cells of the human body?
A.
The genetic information contained in cells differs between cell types.
B.
Different cells perform different functions within the human body.
C.
All cells in the human body are shaped like discs and contain one nucleus.
D.
Environmental factors cannot influence the development of a cell.

B

Explanation:

In the human body, different cells must perform different functions to help the organism stay alive. Some examples of this are skin cells, and body cells.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

preservation because he preserves part of the land and preserves means save

explanation: