HEEL PLEAS Serena knows that scientists use physical characteristics to classify organisms. She studies the figures of four different organisms. Shark , octopus , fish , jelly fish

Which two organisms should Serena conclude are most closely related?

1 and 2

1 and 3

2 and 3

2 and 4

Would really appreciate it, i have an idea but not completely sure

How can antibodies "remember" a particular bacterial invader or "antigen" on that invader?

Taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? view available hint(s)taq polymerase is an enzyme isolated from the organism thermophilus aquaticus. this organism has been found living in the hot springs of yellowstone national park. this enzyme is used to copy human dna from crime scenes. most reactions are performed at ranges similar to those of the human body; however, what considerations should be made for optimum use of this enzyme? the enzyme will not work on human dna. nothing should be altered. the ph should be decreased. the temperature should be raised.