The answer is all Earth's organisms and the non-living environment with which they interact.
The correct answer is: C) ATPase activity must be pumping calcium from the cytosol to the SR against the concentration gradient.
From the example above, we can see that the concentration of calcium is higher in the SR than in cytosol, which means that calcium is moved from the area of lower concentration (cytosol) to the area of higher concentration (SR). This movement is against the concentration gradient and that is the reason for ATPase to act. This process requires energy.
Answer:
familiarity
Explanation: your bodies immune system remebers past aliments in case it faces them again so a vaccine in your body helps your body build up immunity to the ailment before it overwelhms you like a guy took small amounts of black mamba venom until his immune sysste was so used to it he could take a bite and survive unscaved
Answer: In the case of the celery in salt water, water would leave the cells and the stalk will become wilted.
In the case of the beaker with plain water, the water will move into the cells in the stalk. You would see this better if the stalk was already wilted.
Explanation: