Flowering plants first rose to prominence in the
A) Cretaceous period.
B) Paleozoic era.
C) Precambrian era.
D) Eocene epoch.
E) Cambrian period.
A
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Which of the following is the light-absorbing compound used by photoreceptors?
A. opsin B. retinal C. rhodopsin D. both opsin and retinal
Teichoic acids, mycolic acids, peptidoglycan, and disaccharide-pentapeptide subunits are all building blocks of which bacterial structure?
a. Outer cell membrane b. Flagella c. Inner cell membrane d. Cell wall
A boy developed signs of sexual maturity at age 3. A possible diagnosis is
A) XY female syndrome. B) XX male syndrome. C) congenital adrenal hyperplasia due to 21-hydroxylase deficiency. D) pseudohermaphroditism due to 5-alpha reductase deficiency.
Binding of what protein initiates translation-termination events that result in polypeptide release and dissociation of ribosomal subunits?
What will be an ideal response?