Which of the following energy systems requires oxygen?
A.
Aerobic system
B.
Anaerobic glycolysis
C.
ATP-PC system
D.
Lactic acid system

The following energy systems require oxygen - A.  Aerobic system

The aerobic energy system refers to the combustion of carbohydrates and fats in the presence of oxygen.

Thus, the following energy systems require oxygen - A.  Aerobic system

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Aerobic System

Explanation:

All the other systems don't require oxygen

the answer would be roots! roots are the parts of the plant that are underground, and that's how they'd anchor the plant. the stem is above the sol, which doesn't with anchoring. hope this !

to prevent people from getting the ebola virus, countries around the world paid to doctors develop a new vaccine. now that the vaccine has been made, doctors will need to experiment on a large number of people to find out if it works safely.

what is the greatest limitation that scientists are dealing with as they try to figure out how to experiment with the ebola vaccine?

meditation is a practice of sitting still and quiet for minutes or even hours. it has been practiced for thousands of years and is even a part of religious practices for some people. carefully controlled, repeated measurements of brain activity have shown that meditation does increase certain chemicals in the brain and even grows the part of the brain that people connect with their current surroundings and activities.

are claims about the effects of meditation most likely scientific or pseudoscientific?

not pseudoscientific, because people have made claims about it but scientific observations have not been made