2) Based on the geographic features on the map below, why do you think the population density is higher in most of the area you circled?

Describe the iron sulfide hypothesis and the lipid membrane hypothesis.

Radiometric dating is used to tell the absolute age of materials by studying the decay rate of radioactive isotopes. the decay rates of isotopes are constant and are expressed as .

Question#29: why does the tropical ocean have a greater temperature range than the temperate ocean?