CAM plants differ from C4 plants in that CAM plants ________ while C4 plants ________
a. none of the choices
b. fix carbon in two separate chambers to keep CO2 high near rubisco / fix carbon mostly at night
c. produce 3-carbon PGA as the first stable intermediate / produce 4-carbon oxaloacetate as the first stable intermediate
d. open stomata and fix carbon using a C4 pathway at night / fix carbon first in mesophyll cells and again in bundle sheath cells
d
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If the NaCl concentration drops below 1.5 M the cell walls of Halobacterium become more rigid.
Answer the following statement true (T) or false (F)
The cell membrane can be described most accurately as
A) permeable to all small molecules and ions but impermeable to larger ones. B) permeable to only larger molecules. C) permeable to some molecules and impermeable to others. D) impermeable to all polar molecules. E) permeable to all molecules.
Which of the following blocks HIV binding to host cell receptors?
A. Fuzeon B. Acyclovir C. Nevirapine D. Amantidine E. AZT
The life threatening body-wide response that can occur when allergens enter the circulatory system and cause a severe
drop in blood pressure is called ____________________. Fill in the blank(s) with the appropriate word(s).