The UV is needed by the skin to make previtamin D3. Previtamin D3 or cholecalciferol made from the skin will be changed in the liver into 25- hydroxyvitamin D3 and then sent to the kidney to be changed into 1,25- dihydroxyvitamin D3. The last change in the kidney will active the vitamin D. Vitamin D has a role in the calcium absorption which was will strengthen the bone tissue.
Answer:
the couler of the pray. how bright they are
Explanation:
Answer:
d. water is easier to move over the respiratory surface
Explanation:
The concentration of O2 in water is approximately 40 times less than air (4-8mL per liter), this fact in addition to water's greater density and viscosity in comparison with air, means a more demanding process in general. To adapt and reduce these disadvantages aquatic animals developed grills, creating foldings with a larger surface area for gas exchange.<em> The main advantage for gas exchange in water is that the respiratory medium remains moist at all times. </em>
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Adenine, guanine, thymine and cytosine are the four nitrogenous bases that are attached to a sugar molecule<span> on each </span>side of the ladder<span>. When a phosphate, a sugar and a base form an attachment, they create a sub-unit of </span>DNA<span> called a nucleotide. Each nitrogenous base is held together by a hydrogen bond.</span>
The 16s rRNA gene encodes an RNA that would be used as a component of the ribosome during translation (Option c). It is a ribosomal RNA.
<h3>What are ribosomal RNAs?</h3>
Ribosomal RNAs (rRNAs) represent fundamental components of the ribosomes, the protein factories of the cell.
Ribosomes play central roles during the process of translation by which an mRNA is used as a template to produce a polypeptide.
The 16S rRNA is a constituent of the bacterial small ribosomal subunit, which is used during translation.
Learn more about ribosomal RNAs here:
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