Which of the following is an example of a plant responding to the external stimulus of gravity? A.) A seedling growing toward a sunny window
B.) A plant root growing down into the soil
C.) Flowers producing nectar to attract bees
D.) a potted plant wilting when it dries out

Plzz hurry im being timed during times of vigorous physical activity, muscles require a constant supply of oxygen. how does the body respond to these needs? a. breathing rate and heart rate both decrease. b. breathing rate and heart rate both increase. c. heart rate decreases, but breathing rate remains stable. d. breathing rate increases, but heart rate remains stable.

!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.

Cells destroy body cells infected by a virus or bacteria. killer t t memory t none of the above