Prokaryotes that harvest both energy and carbon atoms from organic molecules are called
A. chemoheterotrophs.
B. photoautotrophs.
C. chemolithoautotrophs.
D. photoheterotrophs.
E. nitrogen fixers.
Answer: A
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An essential nutrient __________
a. is produced in high quantities in the body b. is produced in small quantities in the body c. must be obtained through the diet d. is a rich source of minerals
Having the typical ratio of carbon, hydrogen, and oxygen of carbohydrates, the chemical formula for glucose is
A. C12H6O12. B. C6H6O12. C. C12H22O11. D. C6H12O6. E. C6H6O6.
During which stage of mitosis does the nuclear envelope begin to reappear?
a. Telophase b. Anaphase c. Metaphase d. Interphase
Gram-positive bacteria have a
a. thin cellulose wall between two membranes. b. thin peptidoglycan wall between two cell membranes. c. thick cellulose wall outside the plasma membrane. d. thick peptidoglycan wall outside the plasma membrane.