Answer:
I think humans and whales are closely related on the evolutionary tree because they are both mammals and both have endoskeleton
Answer:
b
Explanation:
all living things are made up of cells.
Histamines are chemicals released by the body as an allergic response.They help the body by reacting when their are "intruders" so when enters, histamine acts as a messenger and sends out a signal for the body to create a reaction helping to get rid of teh intruder through some type of reaction.
