Scientists are concerned that humans are putting too much carbon dioxide into the atmosphere by burning fossil fuels in cars and factories. Ultimately, this action has an effect on BOTH the carbon cycle and the water cycle. Explain how this human activity influences both the carbon cycle and the water cycle.

7th grade question (easy) look at the diagram of the food web. the arrows mean eaten by. what would happen if the number of snakes went down? answer choices are in the image.

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

Question 17 (1 point) where does penicillin come from? a. it is a chemical that man invented b. it is a fungus c. it is a toxin made by other bacteria d. it was discovered in archaebacteria