The answer for the first question is B. mucus sweat and tears, all of those are defenses that the body uses when attacked. Now for the second option is A the answer because the first filter that a virus or a desease must pass is indeed the skin. Hope is good for you
C. protein. Nitrogen is a component of amino acids which are the building blocks of protein.
1) d. mitochondria
These are found in both plant and animal cells.
2) b. fluid
Answer:
They are a major absorber of carbon dioxide.
Explanation:
Plants present deep under the seas and algae over the Oceans and under it absorb huge amount of CO2 from our atmosphere.
hope it helps!
