What’s the answer?

1. Periods of stasis, during which organisms do not change in the fossil record, can be
accounted for in modern evolutionary theory by understanding that -
A. the adaptation of plants and animals have not changed very much in the fossil record.
B. the fossil record has gaps caused by slower than usual rates of sedimentation.
C. a constant climate gives an advantage to species that stay in one place.
D. some organisms live for long periods in a habitat with no selective pressure.

What is the cause hearing loss in human being

When it is summer at the south pole, a. the northern hemisphere is tilted toward the sun. b. the southern hemisphere is tilted away from the sun. c. the northern hemisphere is tilted away from the sun. d. both the southern and northern hemispheres are tilted toward the sun.

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.