In humans, genes make up ______ of the DNA.
about 10%
about 75%
85%
less than 5%
about 50%
less than 5%
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Recall that photosynthetic rates remain relatively constant in regions near the equator. Imagine that tropical environments persisted throughout Earth's northern and southern hemispheres (i.e., Earth's entire climate mirrored that near the equator)
If Keeling had collected his atmospheric CO2 data on such an Earth, what would you expect the Keeling Curve to look like? A. a straight line sloping upward (atmospheric CO2 levels do not seasonally oscillate, but have increased over time) B. a straight line sloping downward (atmospheric CO2 levels do not seasonally oscillate, but have decreased over time) C. a sinusoidal curve sloping upward (atmospheric CO2 levels fluctuate seasonally, but increase over time) D. a sinusoidal curve sloping downward (atmospheric CO2 levels fluctuate seasonally, but have decreased over time) E. a straight line without a slope (atmospheric CO2 levels have remained constant over time)
True or False: There are a number of biological clocks and the circadian clock is just one of them
A. true B. false
The breakdown of large molecules by the
enzymes and with the addition of water is what kind of reaction?
a. oxidation b. reduction c. condensation d. hydrolysis e. decarboxylation
Catabolite repression refers to the repression of the lac operon in the presence of which catabolite?
What will be an ideal response?