If the ? of surrounding soil is higher than that in living root epidermal cells, then water should ____
a. leave the root cells, making them flaccid
b. enter the root cells, making them turgid
c. leave the root cells, making them turgid
d. enter the root cells, making them flaccid
e. none of these accurately describe water movement
ANSWER: b
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Which type of cell-surface receptor undergoes changes in phosphorylation in response to binding of its ligand?
A. G protein-coupled receptor B. receptor kinase C. ligand-gated ion channel D. both the G protein-coupled receptor and the receptor kinase
The number of bird species on islands near Papua New Guinea __________ as one gets farther from Papua New Guinea.
A. increases B. decreases C. is unknown D. shows an inconsistent pattern E. None of the choices are correct.
Genetically based characteristics that make organisms more likely to survive and reproduce are referred to as ____
a. acquired characteristics b. adaptive traits c. favored characteristics d. selective traits e. divergent characteristics
In a major protein degradation pathway, a short polypeptide called _______ is attached to a protein to target it for destruction.
a. glutathione b. ubiquinone c. ubiquitin d. KDEL