Muscles are connected to bones via
A) acetylcholine.
B) joints.
C) motor neurons.
D) tendons.
D
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Which of the possible future effects of climate change is most likely to occur according to current predictions from the IPCC?
A. economic collapse of industrialized nations B. decrease of sea ice C. decrease of water resources in Los Angeles D. increase in hurricane intensity
Soil scientists distinguish soil from regolith on the basis of the soil's
A. physical texture. B. chemical composition. C. depth below the surface. D. ability to support plant life.
Because of the challenges associated with removing oil from the ground,
A) the first oil removed from a well is the most expensive to extract. B) primary recovery of oil is more expensive than secondary recovery. C) enhanced recovery of oil is more expensive than secondary recovery. D) only about 60% of the oil in a well can be removed by just pumping.
What animal is responsible for building tropical reefs? What is the term for this behavior? What kind of symbiosis occurs within the tissues of these organisms?