The models below represent a cell before and after it was divided into four smaller cells. Which statement is true? A. The total surface area of the cells in model B is the same as the surface area of the cell in model A. B. All the cells shown in the models are the same size. C. Every cell shown can obtain all the nutrients it needs in the same amount of time. D. The cells in model B have the same total volume as the cell in model A.

Structures in cells that carry out specific functions.

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.

Each hereditary trait corresponds to