48. Use the diagram below to draw the organisms in a four-step food chain. You can choose desert ecosystem or an aquatic ecosystem. Labelach of the fourtrophic evet
49. If 575, 250 Calories of energy are available at the first trophic level, calculate the number of
Calories available to the 2-, 34, and 4 levels.
2 Level:
34 Level:
4 Level:
50. Is it possible for an inverted pyramid to exist, like the one show here? Explain
your answer

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck

hope this

explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

the increase of protons   hope this