Answer:
B
Explanation:
All living things need to breathe, even the microorganism which breathe by a process called diffusion. They might breathe using different of mechanisms or organs but THE POINT IS THEY NEED TO BREATHE.
Answer:
Have hard parts
Were generally large
Lived in a narrow range of geographical area
Are extinct
Explanation:
Nutrients cross the membrane wall with the help of protein channels.
