Normal biota can benefit the human host by making a majority of the nutrients needed in human metabolism
a. true
b. false
b. false
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A _____ crack radiates outward, away from the load point.
What will be an ideal response?
You discover that the underlying cause of a disease is a protein that is now less stable than the non-disease-causing version of the protein. This change is most likely to be due to ________
(a) a mutation within a gene. (b) a mutation within the regulatory DNA of a gene. (c) gene duplication. (d) horizontal gene transfer.
Organelles are __________
A. structures that contain the genetic material. B. membrane-bound compartments of eukaryotic cells. C. the region that contains the DNA in prokaryotic cells. D. the outer, rigid covering of a prokaryotic cell.