Injuries that range from slight (caused by overstretching) to serious (caused by tearing) are _____
sprains
osteoarthritis
scoliosis
bursitis
a. sprains
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Animals establish and defend territories only when ____
a. the effort does not endanger the life of the individual b. males compete for females by fighting c. females choose among displaying males d. some critical resource is in short supply e. territorial defense is not energetically costly
As a scientist, which of the following would you use as evidence to propose changing the traditional animal
phylogenies? a. fossil record b. molecular data c. predator-prey relationships d. newly discovered prokaryotes in soil e. better electron microscope pictures of cells
Select the best response to the question. ?What is a risk factor for contracting tapeworm or hookworm?
A) poor sanitation B)living or traveling in the Middle East C) living in a nursing home D) young age
The greenhouse effect, which has become a major ecological concern, is caused by
A) the destruction of ozone in the upper atmosphere. B) the increase in atmospheric concentrations of greenhouse gases (CO2,CH4, and N2O). C) overuse of fertilizers in farming. D) global warming. E) the release of heat energy from burning fossil fuels.