What happens when lakes are acidified?
a. fish flourish
b. fish die
c. water ecosystem goes unchanged

Why is it important that fibrin is insoluble in water?

What is the next step in muscle contraction after the actin changes shape? (apex)

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them