The (intestines/nasal cavities/lungs) are normally axenic
What will be an ideal response?
lungs
Bloom's Taxonomy: Knowledge
Section: Symbiotic Relationships Between Microbes and Their Hosts
Learning Outcome: 14.3
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When acetyl-CoA containing radioactively labeled carbon atoms is fed to cells, the CO2 produced is not initially radioactive. However, molecules of citrate and oxaloacetate are radioactive. Only after some time has passed will radioactive CO2 be released. What is the best explanation for this observation?
A. Acetyl groups are not metabolized directly into CO2, but enter a cyclical metabolic pathway. B. Acetyl groups first combine with citrate and oxaloacetate before being metabolized into CO2. C. Acetyl groups are not metabolized directly into CO2, but enter a linear metabolic pathway. D. Acetyl groups are metabolized directly into CO2.
Red-green color blindness is an X-linked recessive disorder. A woman with normal vision whose father was colorblind has children with a man with normal color vision. What is the probability that their first child will be colorblind?
A) 1/4 B) 1/2 C) 3/4 D) 0 E) 1
If the frequency of PKU (an autosomal recessive disease) is 1%, what percentage of the population are completely unaffected (homozygous dominant or carrier)?
What will be an ideal response?
Human embryos contain a dorsal, hollow nerve cord, a notochord, pharyngeal slits, and a post-anal tail. What other phylum contains these shared characteristics?
a. Mollusca b. Osteichthyes c. Amphibians d. Chordata