Before it was genetically engineered, what was
the source of chymotrypsin used in cheese
production?
a. calf stomachs
b. pig livers
c. human cadavers
d. sheep brains
e. cow intestines
A
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In your own words, describe one step in the walking cycle.
What will be an ideal response?
Organic molecules with identical molecular formulas and that are structurally mirror images of each other are most specifically referred to as
A. polymers. B. mimics. C. enantiomers. D. hydrocarbon rings. E. saturated fatty acids.
In chordates, which mesoderm structure forms during gastrulation and provides structural rigidity along the dorsal anterioposterior axis of the embryo?
A. Archenteron B. Neural tube C. Notochord D. Epidermis E. Intestinal tract
A reduction in up to 40% of the species on the planet may be caused by what factor?
a. habitat loss b. invasive species c. climate change d. disruption in the carbon cycle