Explanation:
Small substances constantly pass through plasma membranes. Active transport maintains concentrations of ions and other substances needed by living cells in the face of these passive movements. Much of a cell's supply of metabolic energy may be spent maintaining these processes.
Answer:
1. c
2. b
3. a
I hope this is right but I am not sure for the last question tho.
The first two questions are right because I am in high school.
Answer:
Homo erectus. it first spread through africa and eurasia.
pls mark brainliest
Explanation:
A because if you look it up phytoplankton does uses photosynthesis to produce food.
