Plasma membrane is described as Semi permeable because it selects what molecules enter/exit the cell which is important in maintaining homeostasis.
D. Producers provide primary consumers with the chemical energy
they need
Answer:
They are called the building blocks of an organism because all living things are made up of billions of cells that can reproduce, build and change that's why it is called the building blocks of all living things.
Explanation:
Answer:
real subtances? look around you and you'll find out
Explanation:
