Recall that over the last 400,000 years, atmospheric CO2 levels have fluctuated, with the lowest levels occurring during glacial periods and the highest levels seen during interglacial periods
Why might atmospheric CO2 levels be lower during glacial periods?
A. During glacial periods there are more
volcanic eruptions.
B. During glacial periods there are fewer
photosynthesizing plants.
C. During glacial periods more carbon is
stored in ocean reservoirs.
D. During glacial periods chemical weathering
stops.
C
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Chloroplasts are thought to have evolved from cyanobacteria. Which of the following observations support this hypothesis? (Select all correct choices.)
A. They both have similar internal membranes that organize the light reactions of photosynthesis. B. They both have small circular DNA genomes. C. They both have cell walls. D. They both have the capability of movement through flagella.
Electron transfer phosphorylation yields ____ ATPs
a. four b. two c. three d. 32 e. zero
Measure of the tendency of water to move across a selectively permeable membrane; visible as an increase in liquid on the side of the membrane with higher solute concentration.
What will be an ideal response?
The oxygen-dependent reactions required for cellular respiration were originally thought to occur in a linear pathway. By using a competitive inhibitor for one enzyme in the pathway, investigators discovered that these reactions occur in a cycle
What compound served as the inhibitor? (a) malonate (b) malate (c) fumarate (d) succinate