Biology, 26.09.2019 04:00 gymnastics255
Charles is an engineer who is evaluating a prototype of an artificial heart. the prototype beats in a synchronized fashion, is hollow, and has tubes attached to it. it can be powered by electrical signals from the brain when it is interfaced with the appropriate nerves. what important feature should charles notice the prototype is missing?
blood vessels to transport blood
a structure that would divide the hollow heart into chambers to separate oxygenated blood from deoxygenated blood
a blood filtering mechanism to separate oxygenated blood from deoxygenated blood
a structure to pump blood through the valves
Answers: 2
Biology, 22.06.2019 07:30
Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables
Answers: 3
Biology, 22.06.2019 08:00
Which best example best demonstrates the importance of having knowledge of evolutionary relationships? a. illustration of a plant b.organ transplantation between species c. blood donation from a human d. do you need sequence of an insect.
Answers: 1
Biology, 22.06.2019 09:30
Antoine manages a number of apartment buildings that use natural gas for heating, cooking, and laundry. the scatter plot shows the correlation between the outside air temperature and antoine's natural gas bill. which type of correlation does the plot illustrate?
Answers: 2
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