Answer:
It doesnot have a nucleus to increase the surface area
Explanation:
Red blood cells carry oxygen from our lungs to the rest of our bodies .Then they make the return trip, taking carbon dioxide back to our lungs to be exhaled.
Answer:
For example, a forest of trees and undergrowth plants, inhabited by animals and rooted in soil containing bacteria and fungi, constitutes a biological community. A brief treatment of biological communities follows. ... The various species in a community each occupy their own ecological niche.
Answer:
regulating important involuntary bodily2
function such as blood pressure ,heart rate,
breathing,and swallowing
The basic building blocks of matter are called atoms.
Answer:
The answer is Physical. Physical immunity occurs when a person immune system responds to antigen.
Explanation:
