What allows membranes to be permeable to small ions? A Option A: small ions can pass directly through a lipid bilayer B Option B: ion channels C Option C: G-proteins D Option D: aquaporins

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

Which heredity condition causes a buildup of mucus in lungs and pancreas? a. cystic fibrosis b. heart disease c. huntington's disease d. sickle cell anemia

Which of the following can occur to two segments of a population if they are geographically isolated 1.) they can only share some types of genes 2.)both groups most likely become extinct 3.)they find a way to come back together 4.)eventually they become separate species