Circulatory system.....circulates blood (a vital delivery system of oxygen) throughout the whole body when tissues need it the most and with a constant supply.
Answer:
They don't reproduce independantly but have to invade other cells.
Explanation:
DNA is the correct answer but next time put answer choices so that people can better answer your questions. Thanks!
I think A is the answer its hard to explain but i hope this helped.
Answer:
A multicellular organism develops from a single cell (the zygote) into a collection of many different cell types, organized into tissues and organs.During development, cells use both intrinsic, or inherited, information and extrinsic signals from neighbors to "decide on" their behavior and identity.
