The backbone of a DNA molecule is made of which two compounds? - phosphate molecules and ribose sugars
- Deoxyphosphate molecules and ribose sugars
- Phosphate molecules and deoxyribose sugars
- Deoxyphosphate molecules and deoxyribose sugars

Which of the following represents a negatively charged ion? of t 7

Which statement best describes a keystone species? o a. it has littlelmenetic variation. it has an extremely high population. 0 b. 0 c. it remains unaffected by all environmental changes. od. it has a strong influence on the ecosystem. 0 e. it's the first species to populate a new ecosystem.

How do antiviral drugs work? in your own words.