Some ___ have enzymes to break the bonds of
atmospheric nitrogen and use it for the
metabolism of proteins and other nitrogen
containing molecules.
a. fungi
b. bacteria
c. plants
d. protists
e. fungi, bacteria, and protists
B
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Myosin motor proteins use ATP energy to:
A. carry vesicles along a microtubule within a cell in a minus-to-plus direction. B. carry vesicles along a microfilament within a cell in a minus-to-plus direction. C. carry vesicles along a microtubule within a cell in a plus-to-minus direction. D. carry vesicles along a microfilament within a cell in a plus-to-minus direction. E. slide along intermediate filaments to contract muscle cells.
In a molecule of methane, CH4, each hydrogen atom shares an orbital with the carbon atom. The total number of
shared electrons in CH4 is ____.
a. 1 b. 2 c. 4 d. 5 e. 8
Cord blood can be harvested from the umbilical cord of a newborn but can only provide red blood cell replacement in case of needed therapy or damage.
a. true b. false
What modified plant part would include a white potato as an example?
A) stem B) root C) leaf D) flower