In what type of cell prokaryotes or eukaryotes does the cell cycle occur

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Vessels draining the myocardium of the heart, open primarily ,into which chamber?

Describe the change in phase and temperature as water moves from the oceans to the atmosphere and then returns to earth again as rain. a) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature decreases b) evaporation : temperature increases; condensation : temperature decreases; precipitation (rain) : temperature increases c) evaporation : temperature decreases; condensation : temperature decreases; precipitation (rain) : temperature decreases d) evaporation : temperature increases; condensation : temperature increases; precipitation (rain) : temperature decreases