Answer:
control group
Explanation:
The control group is exposed to the same conditions as the experimental group, except for the variable being tested.
They are useful because of the way they process and digest food. They apply their enzymes externally and then absorb smaller mollecules. This process releases things like CO2 or creates alcohols, and this has historically been used in making drinks like beer or foods like bread and cheese.
There are 2 of them :-
1) Phagocytes
2) Macrophages.
These WBCs attach themselves to disease causing pathogens & then engulf them resulting in the destruction of the pathogens.
_________
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Answer:
d. 28,650 years
Explanation:
Since 14C has a single half-life of 5,730 years
The number of years that is going to make up 5 half-lives for 14C will be;
5,730 years × 5 = 28,650 years
