Which one of the following terms applies to the phylum Arthropoda?
A. deuterostome
B. diploblastic
C. coelomate
D. radial symmetry
E. Parazoa
Answer: C
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Nitrification and anammox both
A) create nitrogen gas, but nitrification is aerobic while anammox is anaerobic. B) oxidize ammonia, but nitrification uses O2 and anammox uses NO2- for electron acceptors. C) are aerobic processes, but nitrification produces NO3- and annamox produces N2 gas. D) occur in soils at neutral pH.
Salmon are able to live in both fresh water and salt water. Salmon are therefore:
A. conformers. B. regulators. C. conditioned. D. effectors.
Plant cells permit ions and small molecules to move between adjacent cells by means of cytoplasmic channels in their cell walls. What are these channels called?
a. plasmodesmata b. cell junctions c. desmosomes d. gap junctions
Alpha and beta interferons
A) help protect virus-infected cells from the effects of the pathogen. B) protect the cells that secrete them from being invaded by a virus. C) are produced by infected fibroblasts and macrophages. D) produce active antiviral proteins (AVPs) that coat the surface of healthy cells and prevent the attachment of pathogenic viruses. E) produce no adverse effects in the body.