Answer:
if a molecule is too large it cannot pass. also it depends on the concentration of a specific substance inside the cell. similarly, if a molecule is polar it cannot penetrate the phospholipid bilayer.
there are proteins that work as channels and pumps that allow these molecules to pass
Explanation:
It's b, population total versus number of organisms per unit of area.
Answer:
The statement that is true about BRCA1 and BRCA2 is that people can be tested for mutations on these genes. A doctor can test a patient for these gene mutations and determine if the patient has a chance at getting hereditary breast cancer and ovarian cancer.
Explanation:
