Greenhouse gases allow for the * 2 points
condensation of moisture to form dew.
conversion of carbon dioxide to oxygen by green plants.
heating of the atmosphere by direct solar radiation.
absorption of energy in the atmosphere that otherwise would be radiated back to space.

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.

Which identifies the main purpose of biological taxonomy?

When analyzing tree rings, what do scientists assume a thin ring indicates?