Which of the following domains contain prokaryotic cells?
a. Archaea and Bacteria
b. Eukarya and Archaea
c. Bacteria and Eukarya
d. Archaea, Bacteria, and Eukarya
A
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Experiments are carried out to test a hypothesis by changing one variable at a time and including an unchanged variable termed a(n) _____.
A. experimental variable B. altered variable C. control D. stable variable
In eukaryotes, which three factors appear to encourage the specific association of RNA polymerase(s) to a specific region of DNA?
What will be an ideal response?
Which phylum is most closely related to the arthropods?
A) Mollusks B) Echinoderms C) Roundworms D) Annelids
The photoreceptor for photoperiodism and some other light-initiated plant responses is a group of blue-green pigmentsnamed:a
xanthophyll. b. carotene. c. chlorophyll. d. phytochrome. e. phycocyanin.