B. Nitrogen oxygen, Oxygen, and argon
D is the answer to this question hope it helps
Answer:
An allele (UK: /ˈæliːl/, /əˈliːl/; US: /əˈliːl/; modern formation from is one of two, or more, forms of a given gene variant.
Answer:
Explanation:
The fossil record
This supports Darwin's theory of evolution, which states that simple life forms gradually evolved into more complex ones. Evidence for early forms of life comes from fossils. By studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.
Soil and air because it is needed for the development of living beings
