Fossil evidence suggests that these three animals can be classified in the same phylum, chordata, but in three different
a) classes.
b) kingdoms.
c) divisions.
d) domains.

What is the role of dna ligase in the elongation of the lagging strand during dna replication?

To test the responsiveness of the kidneys, scientists have designed an experiment tracking urine output of people during a normal day, while regulating the in-take of water by mouth. what would be an appropriate hypothesis for this experiment?

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b.hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.