The human eye has three types of cone cells. Damage to any one of the types of cone cells doesn’t cause total blindness because of the A. the presence of rod cells, B. other two functional cone cells, or C. presence of optic nerves. A person who has a nonfunctional cone type won’t be able to identify the A. color, B. shape, or C. size : of objects. PLEASE HELP ME OUT!!! Thank You :)

Round peas are dominant to wrinkled. what would you cross a round pea with to determine if it were heterozygous or homozygous dominant? why? ?

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.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?