Which is a step in the convection cycle in the Earth's atmosphere

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

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

In this assignment, you will analyze an example of speciation by researching the finches of the galapagos islands. then you will answer questions to construct explanations and draw conclusions based on the information you gather. someone plz !