ANSWER: Nitrogen, oxygen or gas, dust particles
Answer:
Explanation:
From the question we are told that
2 species
Assuming that questions a and be are solved
Diversity index D=2p_1p_2
with 
Mathematically



Therefore

Giving

crude oil is composed of B. Hydrocarbons
Answer:
The hydrogen bond between complementary nucleotides (C)
Explanation:
Hope this helped
It is called peristalsis movement.