Which two kinds of organs vertebrate animals take in oxygen and get rid of carbon dioxide? a)gill b)lung c)stomach d)heart

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

Which of these serves as a reference for comparison during a scientific investigation? a)outcome variable (dependent variable) b) test variable (independent variable) c)control group d)hypothesis

Which best describes what you will do in the reaching your academic potential course?