I believe it’s air pressure but don’t be mad if I’m wrong lol
C) DNA is made of 4 types of nucleotides
Not all organisms have 46 chromosomes (23 homologous pairs). Not all organisms have nuclei (e.g. bacteria do not have nucleus)
Here are some that u can choose from:
1.gas filled cars
2.factory's
3.people putting stuff in lakes,pond etc.
4.buildings
Answer:
They create chemical reactions in the body.