True or false On average, about 10 percent of the energy available within one trophic level is transferred to the next trophic level.

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

Which feature of a human community is similar to a niche in a biological community

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?