The diameter of a blood vessel will be reduced by the contraction of ________
a. cardiac muscle
b. smooth and cardiac muscles
c. skeletal and cardiac muscles
d. smooth muscle
e. skeletal muscle
d
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The type of microscopy in which you would observe brightly illuminated specimens against a black background is ________.
A. phase-contrast B. electron C. dark-field D. fluorescence E. confocal
Pyramids of numbers are of limited usefulness because they:a
do not indicate the biomass of the organisms at a given time. b. do not indicate the gross primary productivity of each species. c. do not include energy flow through the ecosystem. d. include three trophic levels. e. None of the answer choices is correct.
The Tat and Sec pathways are protein translocation systems.
Answer the following statement true (T) or false (F)
A chemical reaction that occurs in the absence of oxygen; an example is the fermentation reactions.
What will be an ideal response?