6. true or false. the arrow labeled c represents a transfer of chemical energy to mechanical energy. explain why this is true or false.
7. true or false. the arrow labeled a represents a transfer of solar energy to chemical energy. explain why this is true or false.
8. which arrow or arrows represent a release of carbon dioxide? what process is occurring at the arrow(s) you selected?

What are two reasons for why a species might disappear from the fossil record?

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.

What is the term for the two sets of chromatids formed in the parent cell a.haploid b.diploid c.gamete d.tetrad