When human undergo anaerobic respiration , they

They experience sore muscles

Explanation:

Have a nice day lol <3

It seems that you have missed the necessary options for us to answer this question, so I had to look for it. Anyway, here is the answer. A  paleontologist is trying to be study the DNA of a fossil from an extinct animal called x. He has formulated three hypotheses, and the hypothesis that cannot be tested is this: X's DNA consists of a single strand. Hope this helps.