Answer:
I believe #3, 4, & 5 is your answer.
Explanation:
-When someone's pancreas stops producing the hormone that lowers blood sugar because the person hasn't eaten recently.
-When someone's pancreas hormone increases every time they eat, but decreases when they aren't eating.
-When a person takes calcium supplements so a gland will stop secreting a hormone that pulls calcium from the bones.
Answer:
A+B C. Only one of the unknown substances is a catalyst, and the others are nonreactive with A, B, or C. When 10 mL of A is added to 10 mL of B the reaction takes twenty seconds. Bubbles form when the product C is created. The student prepares three test tubes, each containing both reactants A and B. She adds unknowns X, Y, and Z to test tubes 1, 2, and 3, respectively.
Human activity can affect the river ecosystems because first of all humans take the water and use it for themselves, they also pollute it, disturb the ecosystems and kill fish or oysters etc. in the ecosystems.
