Pulmonary circulation is the key component that supports both respiratory and cardiovascular systems. Examine this diagram of a human heart as seen while looking at the front of the body.

*diagram would be pictured here, but is attached instead*

Which correctly identifies where the blood is flowing to and from?
A: lower body, B: left lung, C: right lung, D: upper body
A: upper body, B: right lung, C: left lung, D: lower body
A: right lung, B: upper body, C: lower body, D: left lung
A: left lung, B: lower body, C: upper body, D: right lung

Place the steps tor the formation of the enzyme pepsinogen in correct order

Use the drop-down menu to match the following definitions to the corresponding terms. the total variety of organisms that live in the biosphere a group of organisms that breed and produce offspring that can breed all of the biotic and abiotic factors in an area

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.