The activation energy of a chemical reaction is closely related to its rate. Specifically, the higher the activation energy, the slower the chemical reaction will be. This is because molecules can only complete the reaction once they have reached the top of the activation energy barrier.
Explanation:
B) Molecules are moving from a higher concentration to a lower concentration
Water molecules from the more concentrated side, will flow into the less concentrated side til they equilibrate- at equilibrium both sides will have the same concentration of solute and water molecules.
In diffusion, small non-charged molecules can move from regions of high concentration to regions of low concentration. This occurs across the phospholipid bilayer, which acts as a semi-permeable membrane into the extracellular fluid or the cytoplasm which are both hydrophilic- this involves the movement of water molecules, gases or other small water-soluble compounds
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In osmosis, molecules of water move across a semi permeable membrane, from regions of high concentration to regions of low concentration until an equilibrium is reached. This always occurs along the concentration gradient within the system.
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Answer:
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Answer:
Helper T cells are arguably the most important cells in adaptive immunity, as they are required for almost all adaptive immune responses. They not only help activate B cells to secrete antibodies and macrophages to destroy ingested microbes, but they also help activate cytotoxic T cells to kill infected target cells. As dramatically demonstrated in AIDS patients, without helper T cells we cannot defend ourselves even against many microbes that are normally harmless.
Explanation:
Answer:
mitosis
Explanation:
The zygote undergoes a process known as mitosis, in which it replicates its chromosomes (which carry each parent's DNA) and then divides, resulting in two identical cells. These cells are called totipotent and have the ability to develop into a new organism