Four of the five answers listed below are adaptations to aid in dispersal of fruit. Select the exception
a. hooks
b. spines
c. smooth surface
d. tufted hairs
e. fleshy fruits
c
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The action potential in a neuron is an all-or-nothing event.
Answer the following statement true (T) or false (F)
Imagine that you have two people using breathing gear under water. Diver 1 is using an old style "rebreather" that removes carbon dioxide before the mixture is "rebreathed" and therefore decreases overall carbon dioxide concentrations in the blood. Diver 2 is using regular SCUBA gear and is breathing air with the normal amount of carbon dioxide that does not lower blood levels of carbon dioxide. Which diver would have a higher blood pH and which would feel more an "urge to breathe"?
A. There would be no difference in blood pH or breathing between the two divers. B. Diver 1 would have higher blood pH and would feel the "urge to breathe" sooner. C. Diver 1 would have higher blood pH, while Diver 2 would feel the "urge to breathe" sooner. D. Diver 2 would have higher blood pH, while Diver 1 would feel the "urge to breathe" sooner. E. Diver 2 would have higher blood pH and feel the "urge to breathe" sooner.
All actions of the nervous system depend on the transmission of nerve impulses over which of the following?
a) neuroglia b) efferent pathways c) afferent pathways d) neurons
Which theory states that eukaryotic organelles originated as prokaryotes that survived ingestion by a host cell and
ultimately evolved mutualistic relationships with the host cell? a. endosymbiont theory b. heterosymbiont theory c. obligative symbiotic theory d. facultative symbiotic theory e. autotrophic symbiotic theory