Tabitha wears glasses, and Adrienne does not. Tabitha can see clearly with her glasses on, but not when she takes them off. Adrienne can see clearly without glasses, but when she puts on Tabitha's glasses, she cannot see anything clearly. Which of the following is a good scientific explanation for how glasses affect Tabitha and Adrienne's vision? A. Glasses always improve a person's vision. B. Adrienne's eyes focus light, but Tabitha's eyes do not. C. Tabitha likes glasses, but Adrienne does not. D. Glasses change the way light is focused in the eyes.

What volume of a 0.25 m solution can be made using 0.55 moles of ca(oh)2

!if we removed the wolf, snake, and hawk from this food web, what best explains the impact it would have? a) the number of producers would increase. b)the number of decomposers would increase. c)the number of primary consumers would increase. d)the numbers of primary consumers would decrease.

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.