I think that the correct answer to this question is D .
The answer is Hox Genes. Just took the exam.
If this question has the same list of choices like the previous ones, the answer would be letter B.. It is based on phylogeny.<span>
</span>>Cladistics<span> is defined as the classification of organisms based on the branchings of descendant lineages from a common ancestor.
</span>
The following are the choices to the question stated above.
A. It is the same as phylogeny.
<span>B. It is based on phylogeny. </span>
C. It is a branch of phylogeny
<h2>Vasa recta </h2>
Explanation:
The vasa recta is a specialized capillary that branches from the efferent arteriole; The blood flow in the vasa recta runs parallel, but in the opposite direction to the flow of tubular filtrate within the nephron loop
- The vasa recta capillaries are long, hairpin-shaped blood vessels that run parallel to the loops of Henle
- The hairpin turns slow the rate of blood flow, which helps maintain the osmotic gradient required for water reabsorption
- Absorbed water is returned to the circulatory system via the vasa recta, which surrounds the tips of the loops of Henle
- Because the blood flow through these capillaries is very slow, any solutes that are reabsorbed into the bloodstream have time to diffuse back into the interstitial fluid, which maintains the solute concentration gradient in the medulla; this passive process is known as counter-current exchange
