12) its harder for the cell to move around due to the extra volume and mass
13) product; reactant
14)the nucleus
15)tissues comes before the organ
16) prokaryotic and eukaryotic
17) prokaryotes do not have a nucleus
18) cell
19) the bass
20) it allows needed materials to move in and out of the cell
21) DNA flagella and nucleus
22) the higher power objective
23)
Answer:
Species could go extinct when their environment changed if they could not adapt to the change.
Answer:
(D) Strenuous exercise has caused her body to be in oxygen debt, and she is breathing hard while lactate is transported to the liver. This is a result of anaerobic respiration.
Explanation:
As Frida was exercising, her muscle cells were undergoing a frantic pace of metabolism (contraction and relaxation), where oxygen supply did not supply the required effort, thus causing muscle fatigue and heavy breathing.
Physical activity is synonymous with moving muscles. The more muscle fibers strive to accomplish a task, the more they consume the oxygen brought into the bloodstream. When this occurs, the body begins to breathe hard as lactate is transported to the liver.
This forces the lungs to work at a fast pace, as they are responsible for oxygenation. The heart also speeds up because it needs to pump blood more vigorously. This is why during exercise the heart rate and breathing rate increase and we breathe heavily.
