Before a stoma opens, ____
a. the level of carbon dioxide inside the leaf increases
b. potassium ions are actively transported out of guard cells
c. potassium ions are actively transported into guard cells
d. the turgor pressure inside the guard cells decreases
e. water moves by osmosis out of the guard cells
c
You might also like to view...
Which of the following is an example of a density-independent regulation?
a. parasites b. waste accumulation c. hurricanes d. predation
Four of the five structures listed below are actively
involved in nerve impulse transmission. Select the exception. a. neuroglia b. neuron c. ganglia d. nerves e. tracts
Precipitation tests involve all of the following except
A. they include the VDRL test for syphilis. B. a cloudy or opaque zone developing where antigen and antibody react. C. they are often performed in agar gels. D. they can be done in a test tube by carefully adding antiserum over antigen solution. E. they rely on formation of visible clumps for detection.
Impetigo is caused by
A. Propionibacterium acnes B. Corynebacterium diphtheriae C. Staphylococcus aureus D. Streptococcus pyogenes E. both Staphylococcus aureus and Streptococcus pyogenes