Vitamin D is different from all other vitamins because it: Group of answer choices cannot be converted to an active hormone in the body. can be synthesized by our body through exposure to sunlight. can donate electrons to other substances. cannot be consumed through a diet.

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.