It would be the branch, wouldn't it?
Answer: They can be found in Fossil Fuels
Explanation:
When animals die, they release carbon which goes into the ground and when it's stored for so long it turns into fossil fuels :)
Answer:
increasing bacterial activity as organic matter decays
Explanation:
that would be your answer
Answer:
b. steroid
Explanation:
Steroids can cross the lipid membrane bilayer thus being able to relay the secondary message.