Which fact about fossils is most important to scientists who study evolution?

a) fossils are often found in sedimentary rock.

b) footprints, body structures, and even animal droppings can become fossilized.

c) the age of a fossil can be determined by examining the rock strata in which the fossil is found.

d) the formation of a fossil depends on the geologic and chemical conditions present when an organism dies.

Name the organism that belongs to the kingdom protista.

Babies with very low or very high birth weight are less likely to survive. observe a graph of the data. % babies born at different weights % babies born in that category 6.0 6.5 in 50-555 70-75 80-8511 100-1055 which statement is a valid claim that could be made using the data in the graph? directional selection is occurring because the graph favors an extreme. mark this and retum save and exit next submit o type here to search

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.