Question

question 7
1 pts
complement
attracts phagocytes.
causes bacteria cells to burst.
is described by all of these characteristics.
is a series of proteins.

Explanation:

The complement system is a part of the immune system. Complement proteins can attract phagocytes (chemotaxis), cause bacteria cells to burst (via the membrane - attack complex), and it is indeed a series of proteins. So all the given characteristics are correct.

Answer:

is described by all of these characteristics.