What conclusion did Darwin draw from the observation that the A. cristatus lizard would let a person catch their tail before
jumping in the water?
O It has many predators in the ocean.
0 It does not like to swim in the water.
o It feels safer in the ocean than on shore.
It is not adapted for swimming.

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.