Answer:
living things respire to get oxygen for living cells to function. Without air, there is no life. Plants use Carbon Dioxide (together with sunlight and water) to produce energy and give out Oxygen as a by-product. This oxygen is what almost all animals need to survive.
Explanation:
hope this helps any
Answer:
oxygen because that's one of the substance that plants produce.
You can also do this by the process of elimination. Knowing that atrazine impedes the production of substances in plants, we know that it can't be DNA and Phospholipid. Carbon Dioxide is used by plant, not produced; thus, oxygen is the answer.
The movement of molecules from a high concentration to a low concentration is called:
diffusion
Answer:
Kilo calories
Explanation:
Kilo calories is a higher unit of energy measurement as compared to the kilo joules.
In one kilo calorie there are 
times kilo joules.
Mathematically, it can be written as
KCal 
Kilo joules
Kilo joules is equal to
kilo calories
Total energy consumed by body is equal to 
Kilo joules
Thus energy consumed in kilo calories is equal to
Kilo calories
