Interferon
A) causes fever. B) causes inflammation.
C) helps cells resist viral infection. D) kills bacteria.
C
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Which of the following is the meaning of the chromosome theory of inheritance as expressed in the early twentieth century?
A) Individuals inherit particular chromosomes attached to genes. B) Mendelian genes are at specific loci on the chromosome and, in turn, segregate during meiosis. C) Homologous chromosomes give rise to some genes and crossover chromosomes to other genes. D) No more than a single pair of chromosomes can be found in a healthy normal cell. E) Natural selection acts on certain chromosome arrays rather than on genes.
Spermatophytes are
A. all plants that produce sperm. B. all living and fossil seed plants. C. all plants that have tracheids and phloem. D. all woody plants.E. all plants with a sporic life cycle.
The above figure represents the research of
which of the following researchers? a. Delbrück b. Avery and McCarty c. Chagraff d. Luria e. Hershey and Chase
Which of the following statements about biofilms is FALSE?
A) Compared to free-living bacteria, biofilms are more sensitive to antibiotics. B) Biofilms in pipes can block the flow of water. C) Biofilms in your body protect mucous membranes from harmful microbes. D) Biofilms on medical devices cause infections. E) Biofilms on rocks provide food for animal life.