What does the arrow mean in the food chain

Why would cannibalism be favored by natural selection?

The human colon supports a large population of beneficial bacteria. How are these bacteria beneficial?

scientists think that red pandas and raccoons share a more recent common ancestor than red pandas and giant red pandas do. If this is true, what would you expect to be true about the genetic sequences in these organisms?

Where are the meristems, vascular tissue, mesophyll, and carpel found in.

What effect do carbon dioxide and methane have on earths atmosphere

Instinct is a changing, biologically inherited behavior pattern. T or F?

In which section of the nephron does the filtrate have a higher osmolarity than the blood when it enters and lower osmolarity than the blood when it leaves?

A population is best represented by

Carolyn suffers from the excessive secretion of insulin in the bloodstream. the medical term for this condition is

Some biological hazards (such as bacteria, viruses, parasites, and fungi) are undetectable by sight, smell or taste and can potentially cause an illness. What are these biological hazards called?