Answer: CO2 in the atmosphere
Explanation:
During photosynthesis, plants removes carbon dioxide in large amount from the atmosphere and then utilize the carbon atoms to build up organic molecules.
Thus, this removal of CO2 from the atmosphere provide a natural solution to prevent the gas accumulation in the atmosphere, which is often generated by human activities and natural causes.
Answer:
Here's what I get
Explanation:
If the orbital is 5d, n = 5 and l=2.
mₗ = -l, -l + 1, -l + 2, …., l
(mₛ is a quantum number for electrons)
Thus, we can have the following combinations.

That makes a total of five 5d orbitals.
The pictures below show what two of them look like.
I'm pretty sure its so the evidence isn't tampered with...
The presence of oxygen determines which process cells will use
Epiglottis
The epiglottis is a flap of cartilage the covers the entrance to the throat protecting the lungs from obstruction. It moves when we swallow to allow food in.