Solutions that are isotonic:a
are not in dynamic equilibrium.
b. have equal concentrations of solute and water.
c. have equal concentrations of solute but not water.
d. have equal concentrations of water but not solute.
e. will exhibit a net movement of water from one solution to the other.
B
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Some plants can tolerate flooding conditions by
A. formation of aerenchyma. B. opening their lenticels. C. forming additional adventitious roots. D. shedding their bark. E. pumping water out of their roots.
Refer to the accompanying figure. The line on the graph labeled B represents the ____
a. change in entropy
b. change in enthalpy
c. free energy of the reactants
d. activation energy with an enzyme
e. activation energy without an enzyme
What is the most accurate description of the consequence(s) of the increased oxygen (O2) in the atmosphere during and after the Silurian Period?
A. Conquest of land by arthropods. B. Conquest of land by arthropods and vertebrates and an increase in animal body sizes. C. Increases in animal body sizes and appearance of shelled organisms. D. Conquest of land by arthropods and vertebrates. E. Conquest of land by arthropods and vertebrates, and plants.
Proprionibacterium acnes, the causative agent of acne vulgaris, is present on the skin of
a. all people, regardless of age. b. teenagers only. c. people with acne only. d. people with very oily skin.