Sea stars are primarily:
a. herbivores.
b. omnivores.
c. carnivores.
d. detritivores.
e. saprophytes
c
You might also like to view...
Of the following, which is the oldest event?
a. origin of fungi b. appearance of land tetrapods c. formation of Pangea d. age of dinosaurs e. all of these events are equally old
____ tissue consists of fibroblasts, has cells surrounded by a calcium matrix, and works with other tissues to move the
body.
a. Bone b. Cartilage c. Tendon d. Cardiac e. Loose connective
In the Hershey-Chase experiment, bacterial viruses, called phage, were used to demonstrate that DNA is the genetic material. The phage that were used for this experiment consisted of DNA surrounded by a protein coat. Phage will attach to specific types of bacteria and inject their DNA into the bacterial cell. To scientifically determine whether DNA is the genetic material, Hershey and Chase made phage in a medium containing radioactive sulfur-35 (S35). Why was S35 used in this experiment?
A. The radioactive sulfur labels peptide bonds. B. Both nucleic acids and amino acids contain sulfur. C. Only amino acids contain sulfur. D. Only nucleic acids contain sulfur.
A person with swollen gums rinses his mouth with warm salt water, and the swelling decreases. Which of the following has occurred?
A. The swollen gums have absorbed the saltwater solution. B. The saltwater solution lowers the temperature of the water in the gums. C. The salt in the solution has moved against the concentration gradient. D. The water in the gums has moved out due to the high concentration of salt in the solution.