Answer:
Synapsis...
<em>Hope that helps!</em>
Explanation:
D) it has to depend on the type of crypt
Convergent evolution in my understanding is the independent evolution of similar features in species of different lineages.
I believe that the loop of Henle is the hairpin structure that connects the proximal and distal convoluted tubules. The loop of Henle is composed of the ascending and the descending limb. The descending loop of Henle connects the proximal convoluted tube with the ascending limb of the loop of Henle, while the ascending loop of Henle connects the descending limb of the loop of Henle with the distal convoluted tubule.
