A deoxyribonucleotide is composed of:
A. a nitrogenous base and a deoxyribose.
B. a nitrogenous base, a deoxyribose, and a phosphate group.
C. a nitrogenous base, a ribose, and a phosphate group.
D. a nitrogenous base and a ribose.
E. a deoxyribose and a phosphate group.
B
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Select the choice that correctly associates the organ with its embryonic sources
A) anterior pituitary gland â€" mesoderm and endoderm B) thyroid gland â€" mesoderm and ectoderm C) adrenal gland â€" ectoderm and mesoderm D) skin â€" endoderm and mesoderm E) brain â€" mesoderm and endoderm
If a cell was to stop dividing, in which part of
the cell cycle would it stop?
a. G1 b. S c. G2 d. telophase e. prophase
Red tides and extensive fish kills are caused by
population blooms of a. Euglena. b. specific dinoflagellates. c. diatoms. d. Plasmodium. e. fish.
After you drink a glass of acidic lemonade, your body's pH does not change. This is an example of how humans and other organisms
A) evolve in response to the environment. B) maintain precise internal conditions through homeostasis. C) are immune to weak acids. D) maintain cellular organization.