Design a controlled experiment that will test the effect of Plant Food X on the growth of a tomato plant and its production of tomatoes. Include a hypothesis, experimental design and all controls and a prediction of the results.

Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give

Blank is a rock with a find dark texture that makes up the oceanic crust