Answer:
All the organic compounds contain carbon and hydrogen as major elements. Rest other elements such as sulfur, phosphorous, oxygen and many more elements can be present in organic compounds but its is not mandatory to have any of them
Explanation:
Because they are studying evolution and without first studying the change in environment they can not do anything
Answer:
A) It is the distance that light can travel in one year
Explanation:
A lightyear is a measure of distance used for all light in space.
It is called population unit hope it helps
