The last option is tt and tt , im really confused on this one

What are the types of mutations, and how does each alter the encoded protein? college level answer

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

Describe the impact of deforestation of both abiotic and biotic factors within the tropical rainforest.