The principal driving force for guttation is
a. passive transport.
b. sunlight.
c. root pressure.
d. upward pressure as sugar is forced into the roots.
e. pumping by the xylem cells.
C
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Substances that can readily pass through the cell membrane are chemically ________ in nature.
Fill in the blank(s) with the appropriate word(s).
the phenotypic ratio for a dihybrid cross is
What will be an ideal response?
Which microscope does not use light in forming the specimen image?
A. phase-contrast B. fluorescence C. dark-field D. bright-field E. electron
Recent strategies for control and containing the spread of river blindness include:
A) antibiotics to inhibit bacterial endosymbionts within Onchocerca volvulus. B) antihelmintic drugs such as ivermectin to destroy the larval worms. C) antiprotozoan drugs such as metronidazole. D) insecticides to decrease the black fly population. E) filtering water through nylon sieves to remove Cyclops.