At the arteriole end of the capillary, precapillary sphincters
a. force blood back into arteries.
b. control blood flow into capillaries.
c. control blood flow into venules.
d. connect arterioles to venules.
e. force blood back into veins.
B
You might also like to view...
The word evolution, as used in biology, literally means
a. natural selection. b. genetic drift. c. divergence. d. genetic change. e. mutation.
Cells produced on the inside of the vascular cambium differentiate to form which vascular tissue?
a. cork cambium b. primary phloem c. primary xylem d. secondary phloem e. secondary xylem
The ________ of the glomeromycetes do not penetrate host root cells; instead, the fungal hyphae grow between and around cells.
A. ectomycorrhizal hyphae B. stolon hyphae C. progametangia hyphae D. arbuscular mycorrhizal hyphae
Generation time can best be defined as
A. the length of time it takes for lag phase. B. the duration of log phase. C. the time it takes for a cell to divide. D. how many generations a cell can divide.