To study some effects of alcohol consumption, Dr. Chu tested the physical coordination skills of 21-year-old men who had just drunk either 4, 2, or 0 ounces of alcohol. In this study, the independent variable consisted of:

Based on the phylogenetic chart, which three statements are true about the relationship between the organisms? a human is more closely related to a mouse than a kangaroo.a platypus is more closely related to kangaroo than a mouse.a human and a kangaroo share common features because of a common ancestor.a platypus and a mouse are more closely related than a platypus and a kangaroo.a kangaroo and a mouse are more closely related than a mouse and a human.

What is the primary goal of human communities?

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.