Splicing, adding of the cap and tail, and the exit of the mRNA from the nucleus.
The answer to this is C because humans don't have cell walls and if you are looking at an onion it has a cell wall because it is a plant.
Green plants absorb light energy using chlorophyll in their leaves. They use it to react carbon dioxide with water to make a sugar called glucose. The glucose is used in respiration, or converted into starch and stored. Oxygen is produced as a by-product.
The study of statistics. Like the increase or decrease of things. For example birth rates or the size of the human population.
I hope this helps :)