During the pliocene epoch, which of the following organisms appeared for the first time in the geological record?
a. horses
b. mammoths
c. mastodons
d. modern humans

In the ocean why are the greatest amount of primary producers found in the epipelagic zone and how does that affect biodiversity

In one or two well-crafted paragraphs in your laboratory journal, summarize the process in which normal cells become cancer cells. your paragraph(s) must include each of the terms listed below. underline each term in your writing:

Crossing over is a method of (blank)?