Which of the following features of ancient horses are adaptations for living on open grasslands? Check all that apply.
_____ multiple toes that increased flexibility
_____ complex patterns of ridges on molar and premolars that increased chewing ability
_____ lengthening of limbs that increased running speed over long distances
_____ decrease in body size that increased agility in confined spaces
_____ multiple toes that increased flexibility
__X__ complex patterns of ridges on molar and premolars that increased chewing ability
__X__ lengthening of limbs that increased running speed over long distances
_____ decrease in body size that increased agility in confined spaces
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In the United States, most common exposure to Clostridium botulinum and its toxins occurs through __________.
Fill in the blank(s) with correct word(s).
How do ectotherms control their body temperature?
What will be an ideal response?
Plants and animals that rely on diffusion to move molecules through their bodies tend to ________
a. be large b. have respiratory and vascular systems c. be small and flat d. evolve few adaptations because diffusion is a passive process
What is responsible for the dispersion of excess heat from the tropics to higher latitudes?
a. Greenhouse gases b. Decreased solar radiation c. Winds, waves, and currents d. Seasonal changes in the atmosphere