Answer:
B.Active transport, because energy is being used to move molecules against the concentration gradient
Explanation:
Substances move in and out of living cells through various transport means. Some substances move passively (without energy) while others move actively (with energy). Active transport of substances involves the movement of molecules against the concentration gradient.
Active transport moves against concentration gradient in the sense that the movement occurs from a region which is less concentrated to one which is more concentrated, hence, energy input in form of ATP is required for such transport to occur. This is the case of the cellular transport in the diagram. Therefore, it is an ACTIVE TRANSPORT because energy input (ATP) is required.
Note, Osmosis and facilitated diffusion are types of passive transport that requires no energy to occur.
B, ligand-gated ion coupled receptor signaling
<span>The first two tenets of the Cell theory were postulated by Schleiden and Schwann at the first half of the 19th century. Those tenets are that "all organisms are composed of one or more cells" and that "the cell is the basic unit of life". In 1855, Rudolf Virchow added the third tenet "Omnis cellula e cellula" which means that "all cells come from cells". In other words, cells can be formed only in the division of other cells.</span>
Answer:
A phenomenon, in a scientific context, is something that is observed to occur or to exist.
Explanation:
Examples of natural phenomena include gravity, tides, biological processes and oscillation.
Social phenomena are those that occur or exist through the actions of groups of humans. there is also difference between it and the natural phenomenon.
<u><em>natural phenomenon</em></u> - all phenomena that are not artificial. phenomenon - any state or process known through the senses rather than by intuition or reasoning.
