When during the cell cycle do chromosomes first become visible?

What is the correct trna sequence that would match the following mrna sequence.gcgaua

Select the word from the list that best fits the definition a system made of 25 satellites

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