The four most abundant elements needed by the human body are carbon, hydrogen, oxygen, and nitrogen. Because these are needed in large amounts to support our cells, these are referred to as
A. buffers.
B. bulk elements.
C. essential elements.
D. trace elements.
E. isotopes.
B. bulk elements.
Biology & Microbiology
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ATP is a nucleotide composed of adenine ____ , and three phosphate groups
Fill in the blank with the appropriate word.
Biology & Microbiology
Annelids are characterized by (select all that apply):
A. cylindrical, segmented bodies. B. extensive nervous systems. C. radula for feeding. D. hydrostatic skeletons. E. ecdysis.
Biology & Microbiology
It will take approximately ____ years for
Carbon 14 to be reduced into half of the original substance.
a. 16,000 b. 11,200 c. 8,200 d. 5,370 e. 300
Biology & Microbiology
Proteins store genetic information in a cell.
a. true b. false
Biology & Microbiology