The functional unit of the kidney is called
A. Bowman's capsule.
B. a collecting duct.
C. a nephron.
D. a loop of Henle.
C. a nephron.
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Bulk flow in the phloem tissue is mostly downward whereas bulk flow in xylem is mostly:
A. sideways B. also downward C. very little bulk flow occurs in xylem D. flow of sugars E. upward
You have decided to repeat Palade’s experiments on the endomembrane system. You think you’ve done everything correctly, but when you observe your final sample under the microscope, you find that the entire endomembrane system contains tiny black dots. When you look at later timepoints you see the same thing. What part of the experiment did you forget?
A. You forgot to add radioactive amino acids. B. You forgot to add osmium tetraoxide. C. You forgot to add nonradioactive amino acids. D. You forgot to add the silver-containing emulsion. E. You didn’t forget anything, this is what the experiment is supposed to look like.
What is the biological species concept put forth by Ernst Mayr in 1942?
What will be an ideal response?
Which factor explains a uniform distribution of individuals in a population?
A) soil nutrients available to a species of plant B) territoriality in a species of bird C) oxygen levels in a pond, where an oxygen-dependent bacterial species lives D) food availability for humans living in a certain geographic area