5. According to the video, what is the goal of the tree of life? a. To summarize a fossil record
b. To describe how natural selection works
To be a library of all life that has ever lived
d. To explain how all species are related to each other

What are some possible short and long term medical concerns for crew members on longer space exploration trips

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england