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the nervous system: mastery test
select the correct answer from each drop-down menu.
when the see is hit with a rubber hammer, the leg kicks forward, and then returns to the original position. this is an example of a spinal
reflex arc. the sensation of the hammer travels to the 1) spinal cord, brain, leg, or eyes.
where it activates motor neurons that cause the leg to move. this
reflex is part of the 2) sympathetic, autonomic, or somatic
nervous system.

2points what is the term for a female reproductive cell? a. egg b. chromatid c. allele d. fertilization

Identify the missing parts of the carbon cycle

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.