Use the following chart to find the meaning of prokaryote.

a. before cells with a true nucleus

b. cells before or after with a true nucleus

c. cells with a nucleus before eukaryote cells

d. before cells without a true nucleus

Which of the following conclusions can be drawn

Name the plastid and pigment likely to be found in the cells of (a) petals of sunflower (b) ripe tomato.

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.