The term for describing a region’s biological wealth is called ____
a. endemic species
b. hot spots
c. biodiversity
d. endangered species
e. threatened species
ANSWER: c
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Communities are composed of all of the:a
communities of all the different populations that live together within an area. b. ecosystems within the biosphere. c. populations of all the different species that live together within an area. d. various dispersal patterns of the different species within a given area. e. population's females' combined reproductive capabilities within the same given unit of time.
Use the following dataset to answer the following question.NameMonthCommissionTenureTravel ExpenseSophie Castro1$48,0004 years$11,000Travis Turner1$53,0007 years$21,000Elias Hansen2$67,00010 years$7,000Amanda Garza2$72,0008 years$14,000What type of dataset is this?
A. Panel B. Pooled cross-section C. Cross-sectional D. Time series
Which of the following mechanisms dissipates heat?
a. Countercurrent exchange between vessels that service the extremities b. Trapping air by raising fur or feathers c. Vasodilation of surface vessels d. Vasoconstriction of surface vessels e. Countercurrent exchange between vessels that service the extremities and vasoconstriction of surface vessels
Since there is a larger concentration of potassium ions inside a neuron, why is the inside of the neuron negative (-70mV) relative to the outside?
A. The negative sign is just a historical convention. B. Potassium ions carry a negative charge. C. The high concentration of sodium ions outside the cell makes the inside negative by comparison. D. Negatively charged proteins inside the cell counteract the charge of the potassium ions.