B. a desert in southern Texas. In heat sound waves travel faster because the heat gives them more energy which allows them to vibrate faster.
Answer:
B. The rating number means it will protect you that many times longer than without sunscreen
Explanation:
The sun protection factor is a comparison between the length of time it will take for a skin that has no sunscreen to begin reddening compared to a skin with sunscreen applied. Therefore, the ratings is an indication of the length of time a person will be protected from ultraviolet rays than when the individual has no sunscreen applied.
While higher SPF's are believed to offer more protection against UV rays, the added protection is usually just a negligible amount. They are very important for the skin and protect the body against diseases like cancer.
Answer:
The correct option is E) Contraction still occurs because Ca2+ can enter the cell directly through Ca2+ channels in the plasma membrane and bind to calmodulin.
Usually, the calcium ions are released from the sarcoplasmic reticulum of a cell during a muscle contraction, but if those are blocked, the contractions is an cell can still arise through the calcium ions which are present in the cell membrane of a cell.
Answer:
It has high temperatures and low precipitation. the reason this would be corect is because, if very little preicipitation/rain/water doesn't happen then how are the tree suppsoed to get it nutrients or how are the leaves suposed to get its nutrients so it doesn't because rotten and fall of the branches. Some areas that may not have much precipitation coming in, may most likely not have tress in the whole area or everywhere.
