Even the cell membrane is like the cell wall its flexible and lets certain things in and certain things out.
A: Glyclosis
This is just a guess as I need to answer at least one question
Answer:
Billions
Explanation:
"Then each of these strands can be used to create two new copies, and so on, and so on. The cycle of denaturing and synthesizing new DNA is repeated as many as 30 or 40 times, leading to more than one billion exact copies of the original DNA segment."
Carrying capacity is the maximum amount of organisms a certain ecosystem can sustain with the resources available in a given ecosystem.
Factors that could either increase or decrease the K, carry capacity, would be: drastic weather causing depletion of resources, decreases in competition, etc.
Fossil Fuels; Once they run out ,humans can not replacing them.