A method used to prevent soil depletion is b. Contour farming
All of the above
all options are related to the explanation of aids
White blood cells produce antibodies to destroy......
The disease causing microorganisms have protein markers called antigens on their surface
I believe the answer is: D) supplying oxygenated blood to the arteries that travel to all major parts.
The function of the aorta is to supply oxygen-rich blood to the rest of the body into systemic circulation. This differs from answer choice A because choice A seems to be discussing pulmonary circulation, as opposed to systemic. (Pulmonary circulation occurs within the heart and lungs; systemic circulation occurs throughout the body.) Therefore, if the aorta of a human heart is damaged, the ability to supply oxygenated blood to major body parts would be affected.
I took the test on Plato and got it correct. The answer is engineers.