Gross primary productivity is the rate of photosynthesis minus the rate of plant respiration
____________________ Indicate whether the statement is true or false.
F, Net
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What do you know about the link between H+ concentration and pH?
What will be an ideal response?
Alveoli are surrounded by pulmonary capillaries
Indicate whether the statement is true or false.
The function of nucleosomes is to:
a. prevent DNA strands from tangling. b. help DNA replicate. c. make RNA synthesis possible. d. prevent RNA from tangling with DNA during transcription. e. prevent histones from tangling.
How are steroids able to cross cell membranes and enter cells?
A) Steroids and cell membranes both contain receptor proteins. B) Steroids are able to pass through the phospholipid bilayer. C) Steroids can diffuse through open channel proteins in the membrane. D) Steroids move through cell membranes by osmosis.