Ken enjoys bird watching. every summer, he sees many ruby-throated hummingbirds in his garden. however, during the winter, he never sees any ruby-throated hummingbirds. which of the following is a testable hypothesis that ken could make to explain the winter absence of the hummingbirds?
a.
where do ruby-throated hummingbirds go in the winter?
b.
do ruby-throated hummingbirds like cold weather?
c.
ruby-throated hummingbirds do not like being cold.
d.
ruby-throated hummingbirds hibernate during the winter.

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.