During which of the following time periods does a C4 plant use rubisco?
a. daylight only
b. in darkness only
c. noon to midnight
d. midnight to noon
e. all 24 hours of a standard calendar day
A
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Normal hemoglobin is a tetramer, consisting of two molecules of ? hemoglobin and two molecules of ? hemoglobin. In sickle-cell disease, as a result of a single amino acid change, the mutant hemoglobin tetramers associate with each other and asse
A) only altered primary structure B) only altered secondary structure C) only altered tertiary structure D) only altered quaternary structure E) altered primary structure and altered quaternary structure; the secondary and tertiary structures may or may not be altered
If researchers never evaluated the amount of 14C in the atmosphere, they could still use 13C levels to demonstrate causation between human activities and increased atmospheric CO2
A. true B. false
The cytoskeleton
A. helps maintain cell shape. B. anchors organelles. C. provides architectural support. D. functions in movements of the cytoplasm. E. All of the choices are correct.
Regelation
What will be an ideal response?