Water, air, food. and heat.
Answer:
the third one
Explanation:
physical change is only on looks
The relationship between you and your group mates will improve
They are different because the <em>embryonic stem cells</em> can be all cell types of the body because they are Pluripotent. Where as the <em>adult stem cells </em>are thought to be limited to only their tissue of origin
Pluripotent (<em>Adjective)</em>
An immature stem cell, capable of giving rise to to several different types of cell.
Natural Selection is: <u>the process whereby organisms better adapted to their environment tend to survive and produce more offspring.</u>
An example of this is our appendix. We no longer use our appendix because food nowadays is softer than what our ancestors used to eat.
Our ancestors could quickly digest (through their appendix) tree barks because they ate them frequently versus now we don't even use them at all
