Question

the primary consumers
the producers with the most energy
why are food chains limited in length?
a. predators become too large
b. not enough energy remains for transfer
c. species become extinct
d. competition becomes too intense
which statement about energy pyramids is correct?
a. the top level contains the most energy
b. all levels contain equal energy
c. the bottom level contains the most energy
d. energy increases at each level

Explanation:

For the question about why food - chains are limited in length, in an ecosystem, energy transfer between trophic levels is inefficient. Only about 10 - 20% of the energy is passed on to the next level. As the food - chain progresses, there is not enough energy remaining for further transfer, limiting its length. For the question about energy pyramids, energy pyramids represent the flow of energy in an ecosystem. Producers at the bottom level capture the most energy from the sun and have the most energy available in the ecosystem. As you move up the pyramid to higher trophic levels, the amount of available energy decreases.

Answer:

1. b. Not enough energy remains for transfer
2. c. The bottom level contains the most energy