Viruses infect every organism that has been investigated for their presence. However, viruses can only replicate in
A. a very limited manner if they are a retrovirus.
B. a very limited number of the host's cells.
C. their lytic stage outside the host cell membrane.
D. very limited conditions, depending on their capsid type.
E. a very limited manner depending on their envelope capability with the host's cell membrane or cell wall.
Answer: B
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Which of the following describes an example of how ocean acidification impacts aquatic communities?
A. Plankton cannot survive in overly acidic waters, so the shellfish that depend on their presence begin to die off as well, causing a chain reaction in the community. B. Shellfish over-calcify their shells, meaning those organisms that depend on them for food must find other food sources. C. Shellfish cannot reproduce in acidic waters, meaning their population sizes have decreased, negatively impacting others in the community that depend on their presence. D. Shellfish cannot calcify their shells, meaning they are at an increased risk of predation, negatively impacting others in the community that depend on their presence.
The theory that eukaryotic organelles originated as prokaryotes that survived ingestion by a host cell
and ultimately evolved mutualistic relationships with the host cell is termed the:a. obligative symbiotic theory. b. heterosymbiont theory. c. endosymbiont theory. d. facultative symbiotic theory. e. autotrophic symbiotic theory.
Which organisms are used to make salt pickles?
A. Pediococcus cerevisiae and Lactobacillus plantarum B. Saccharomyces cerevisiae and Leuconostoc mesenteroides C. Leuconostoc mesenteroides and Spirulina D. Propionibacterium and Spirulina E. Streptococcus lactis and Lactobacillus
Fatty acids are metabolized by the ________ pathway.
A. gamma-oxidation B. beta-oxidation C. alpha-oxidation D. delta-oxidation