Hello iv got annual exam tommorow need a smart assistant grade 7 science Only in hangouts i will give 700points if helped

The image shows ekgs of a person with normal heart waves and of a person having tachycardia. based on this image, what kind of condition is tachycardia? a. the heart beats abnormally fast. b. the heart beats abnormally slow. c. the right atrium of the heart stops working. d. the left ventricle pumps less blood to the aorta.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

Why is it incorrect to say that mitochondria function only as energy factories with cell