The mitochondria, in ancient times, used to be a species of it's own. Until one day a unicellular organisms gobbled up a mitochondria and digested it. The mitochondria continued doing it's mechanical functions. (like protein synthesis etc..) Therefore, mitochondria is a living being on it's own sense and hence needs the essential nutrients (like all living beings do) to continue doing it's mechanical functions.
Answer:
C. Physical fitness.
Explanation:
Physical fitness is the ability of the body systems to work efficiently.
A. and B. do not involve all body systems and D. endurance, refers to the ability to withstand a given exercise.
Anything that takes up space and has mass.
Answer:
limit the bug bites and contact with infected birds
Explanation:
One way they could limit the bites is a way ther're already doing it with bug screens when they sleep over the beds, that and bug spray.
the birds could be solved with feeding stations outside of civilizations and scarecrows in the towns.
It said 60 to 100 so i would say 80
