If water is scarce, a plant's guard cells will and the stomata will .
A. swell; close
B. collapse; open
C. collapse; close
D. swell; open
E. None of the answer choices is correct.
C. collapse; close
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Scientists have found that extinction rates among ____ are accelerating rapidly
a. endangered species b. trigger species c. bird species d. amphibian species e. plant species
Which BMI range has the lowest relative risk of death?
A) 18-24.99 (normal weight) B) 25-29.99 (overweight) C) 30-34.99 (moderate obesity) D) 35 and above (severe obesity)
Which of the following could trigger the lytic cycle of a bacteriophage?
A. Host cell stress B. Host cell replicating its genome C. Host cell dividing D. Bacterial protein synthesis
Which of the following cell types is responsible for the cell-mediated immune response?
A) T cells B) B cells C) leukocytes D) red blood cells