Why is the base of an energy pyramid wider than the top? * a. there are usually many more producers than top predators in an ecosystem. b. only a small portion of energy can be passed from a lower level to the level above it. c. both a and b are true. d. neither a nor b is true.

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.