C is the answer
Mescaline is considered a hallucinogen.
PCP is also considered a hallucinogen
The correct answer is C. Oxygen
Hope this helps
-AaronWiseIsBae
Answer:
it is a please mark branliys
Explanation:
A population of organisms must exist. There must be variation among the members of the population. There must be a mechanism by which some members of the population can produce more offspring than other members. There must be a mechanism by which the variation among members of the population is passed on to their offspring.
Answer:
Cockroach is you answer.
Explanation:
They do this by using a very efficient breathing system that uses air filled tubes, called trachea, to deliver oxygen directly to cells. Oxygen flows in as required into the tracheal system through valves on the insect, called spiracles. But, sometimes, they shut their spiracles and stop breathing.