Temperature, salinity, and sediment composition are all examples of what?
a. Abiotic factors
b. Environment
c. Anaerobic factors
d. Biotic factors
a
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Transformation and homologous recombination allow for the formation of heteroduplex DNA. Which of the following would occur during DNA replication of this molecule?
A) One daughter strand is complementary to the recombinant DNA molecule, while the other daughter strand is complementary to the parent DNA molecule. B) Both daughter strands are complementary to the recombinant DNA molecule. C) Both daughter strands are complementary to the parent DNA molecule. D) None of the answers are correct.
The human body has about 10 bacterial cells for every eukaryotic cell. Bacteria coat our skin, gut, and mouth. Also present are protists, Archaeans, and viruses. Collectively, these organisms are our microbiota
For most members of our microbiota, our body provides their environment (or space to live). They, in turn, have no effect on us. This is an example of _______________. A. mutualism B. an antagonistic relationship C. commensalism D. predation
Which of the following statements is false regarding RSV?
A. RSV infects infants aged 6 months and younger; it is unlikely that a 4-year-old would develop a respiratory disease as a result of this virus. B. While RSV is most prevalent in infants 6 months of age and younger, the highest mortality rate is in those children with underlying risk factors such as prematurity. C. Infants aged 6 months and younger are the most susceptible to infection by RSV; however, adults and older children can also become infected with this virus. D. Although RSV is most prevalent in infants aged 6 months and younger, usually by age 2 most children have been exposed to this virus.
What is the defining characteristic of the hornworts?
a. large and flat gametophyte b. large and cone-shaped spores c. narrow pipe-like sporophyte d. thin tubular rhizoids