How long can food be left out at room temperature is it 1,4,2 or 8 hours?

What are the stages of intercellular signaling

Why does menstruation occur?

What type of isolation occurs when species mate at different times of the year?

DNA replication a. occurs through the addition of nucleotides to the end of the DNA molecule. b. results in the formation of four new DNA strands. c. produces two daughter DNA molecules that are complementary to each other. d.

How does the excretory system interact with the circulatory system?

Define trawling, and explain the ecological damage associated with it.

Which stimulus would a flatworm be able to detect The color of a predator The feel of an approaching rainstorm The sound of splashing water The smell of prey

How are fish adapted to thier enviroment?

This is a type of protein found in a cell membrane which regulatesthe coming and going of substances into or out of the cell

Competition over resources occurs between organisms