Oxygen is carried in the blood by red blood cells. At high altitudes, the body cannot take in as much oxygen because of the low atmospheric pressure, so to compensate, the body produces more red blood cells. Even when one returns to low altitudes, these extra red blood cells remain for about two weeks. Using this information, propose a reason why athletes often train at high altitudes before a competition.

solvent

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answer; //the above statement is (false);

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

answer: if she breaths she a thho

explanation: