Normally they have equal protons and neutrons
The process coevolution is a type of relationship between organism wherein they reciprocally affects each others evolution.
The plasma membrane needs lipids, which make a semi-permeable barrier between the cell and its environment. It also needs proteins, which are involved in cross-membrane transport and cell communication, and carbohydrates, which decorate both the proteins and lipids and help cells recognize each other. Hope this helps :)
I thought it was (d) but I might be wrong
Answer:
It's bases of an object's position
