The birth defect spina bifida results in part of the spinal cord lying outside of the body. This defect is due to abnormal development of the
A) gill grooves.
B) allantois.
C) placenta.
D) embryonic disk.
E) neural tube.
E
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What will be an ideal response?
Some virus shapes that infect members of Archaea are unique from other viruses that infect eukaryotes and bacteria
Indicate whether the statement is true or false.
Human sweat has antimicrobial activity due to
A. production of an antimicrobial peptide called cathelicidins. B. production of low molecular weight compounds that chelate free iron. C. production of low molecular weight compounds that maintain an alkaline pH. D. competition with normal sweat gland flora.
A "decolorizer" is used to:
A. Wash off the slide inbetween the steps of the staining procedure B. Wash off excess stain after each staining step C. Selectively remove stain from certain types of cells D. Stain gram-negative cells