The best description about the brain stem is: it is the most important organ of our body's survival. It connects the brain and the spinal cord, controls the vital organs like the lungs and heart and it also coordinates the many essential body reflexes.
what are the choice answers
Answer:
Facilitated diffusion in a cell has a limited amount of carrier and channel proteins, wherein if all are being used or saturated, can't transport the substances outside in to the cell, leading to the plateau of the substance.
Explanation:
In <u>low concentrations</u> of the substance outside the cell, <u>facilitated diffusion behaves like simple diffusion</u>, carriers and channels are not all used up. But in instances of <u>high concentration of the substance</u> outside the cell, <u>all the carrier and channel proteins are occupied</u> with the said substance. So <u>even if we increase the concentration of the substance, it will not increase the rate of diffusion.</u>
Answer:
In stage 1., the enzyme RuBisCO incorporates carbon dioxide into an organic molecule, 3-PGA.
In bryophytes, haploid reproductive cells are produced by the gametophyte. <span>Gamete-producing organs are found on gametophyte plant (the dominant form) and they are called gametangia. The haploid organ that produces male gametes is antheridia, and female producing organ is called archegonia (it produces ovum).</span>
