How does the open ocean have the highest relative net primary productivity while having one of the lowest mean biomass per unit area?
A) high turnover rate of plankton
B) high mean net primary productivity
C) the presence of large organisms like whales
D) having a larger third dimension of depth
A
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What is the association between tropomyosin and troponin molecules in resting striated muscle fibers?
A. Tropomyosin holds the troponin in place on the actin. B. There is no known association. C. Troponin holds the tropomyosin in place on the actin. D. Troponin holds the tropomyosin in place on the myosin. E. Tropomyosin holds the troponin in place on the myosin.
Which of the following is the correct path in the endomembrane system for a protein synthesized on a ribosome attached to the rough ER?
a. rough ER ? smooth ER ? Golgi complex ? plasma membrane b. rough ER ? vesicle ? smooth ER ? plasma membrane c. rough ER ? vesicle ? lysosome ? plasma membrane d. rough ER ? Golgi complex ? vesicle ? plasma membrane
Crop plants modified to be resistant to insect damage produce Bt toxin from a (bacterial/fungal/synthetic) gene
What will be an ideal response?
Chloroplasts differ from mitochondria in that the former have
A. DNA. B. two lipid bilayers. C. 70S ribosomes. D. thylakoids. E. cristae.