Which of these three mechanisms illustrates
facilitated diffusion?
a. A
b. B
c. C
d. both A and B
e. none of these
Answer: b
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____ speciation is the gradual emergence of two or more species as a result of the geographic separation of two or more groups of animals of the same species
Fill in the blank with the appropriate word.
The oldest fossils are typically found in the sediments ________.
A. located closest to the surface B. located close to water C. located close to human dwellings D. located deep under the surface
What three features define eusociality? (Check three.)
_____ colony resides in an enclosed hive or nest _____ cooperative brood care _____ haplodiploidy _____ insect species only _____ overlap of generations _____ reproductive division of labor _____ reproduction during a mating flight
In considering life’s hierarchy of organization, the _____ is best described as all the environments on Earth that support life, or even as the Earth itself.
Fill in the blank(s) with correct word