Defibrillators work by ____
a. pumping adrenalin into heart tissue
b. delivering an electric shock to the heart’s pacemaker
c. automating CPR
d. massaging the heart using remote sensors
e. delivering mechanical pressure to the heart
ANSWER: b
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Shortly after ingesting a big plate of carbohydrate-rich pasta, you measure your blood's hormone levels. What results would you expect, compared to before the meal?
A) high insulin, low glucagon B) low insulin, low glucagon C) high insulin, high glucagon D) low insulin, high glucagon E) low insulin, no change in glucagon
The deep scattering layer refers to:
a. an area where organisms are spread apart in a random manner. b. a dense aggregation of migratory zooplankton and fish. c. a safe area where zooplankton can quickly scatter to avoid predators. d. where sonar from whales travels rapidly to facilitate their communication. e. the abyssal zone.
How are fossils older than 60,000 years dated?
a. directly dating the fossil with carbon 14 b. directly dating the fossil with uranium 238 c. dating rock formations below the fossil d. dating rock formations above the fossil e. dating rock formations above and below the fossil
Four of the five answers listed below are related by a common phase of mitosis. Select the exception
a. chromosomes align at the spindle equator b. sister chromatids become individual chromosomes c. centromeres divide d. the chromosomes move apart e. spindle microtubules shorten, pulling chromosomes toward the poles