3) a glacier because a river would be a V shape, mud flow would cause the valley to have flat bottom
I think the answer is photochemical smog.
Hope this helped!
Niacin is also known as Vitamin B3. It is needed by the body because it produces the coenzymes NAD and NADP which are responsible for the body's metabolic reactions. If you are deficient of niacin, the body can synthesize it using tryptophan. Food sources of tryptophan include eggs, liver, peanut butter and dairy products.
This molecule is called the transfer Ribonucleic acid (tRNA).
The trasnfer RNA is a type of RNA molecule that helps decode a messenger RNA (mRNA) sequence into a protein. The tRNAs function at specific sites in the ribosome during translation, which is the process that synthesizes a protein from an mRNA molecule, that contains the codons.
<span>The answer is contralateral. It means that the reflex happens on
the contradictory side of the body from the stimulus. To produce this reflex, divisions
of the afferent nerve fibers cross from the stimulated side of the body to the
contralateral side of the spinal cord. There, they synapse with interneurons,
which, in turn, excite or prevent alpha motor neurons to the muscles of the
contralateral limb.</span>