Why does a population of fruit flies in a glass vial in the laboratory grow more slowly as it approaches its carrying capacity

In which situations is the principle of cross-cutting relationship useful in determining relative age?

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

Explain the significance of meiosis in sexual reproduction