Avery and his coworkers showed that the agent responsible for changing nonvirulent bacteria into virulent bacteria was
A. protein.
B. polysaccharide.
C. DNA.
D. RNA.
E. lipid.
C. DNA.
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Which large group of animals consists largely of osmoconformers?
A. marine invertebrates B. bony fish C. mammals D. insects E. amphibians
Georges Cuvier and his followers developed the theory of ____, reasoning that each layer of fossils represented the
remains of organisms that had died as a result of dramatic shifts in ancient environments.
a. fossilization b. uniformitarianism
c. sedimentation d. catastrophism e. gradualism
Explain the concept "the genetic code is almost universal." Why is it important?
What will be an ideal response?
The members of the supergroup Archaeplastida that have cell walls impregnated with calcium carbonate and help build coral reefs are the
A. multicellular green algae. B. dinoflagellates. C. brown algae. D. diatoms. E. red algae.