All of the following adaptations are evolutionary adjustments made by at least one mammal, except
a) ectothermic metabolism.
b) live birth into a pouch.
c) nourishment of young with milk.
d) specialized, varied teeth in the same mouth.

answer: "circumcision is a common procedure in which the skin covering the tip of the penis is surgically removed."

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.