**Please Help- SCIENCE** What is most likely the amount of energy available at a trophic level of primary consumers if the amount of energy available to secondary consumers in that food web is 200 kilocalories?

0 kilocalories
20 kilocalories
200 kilocalories
2,000 kilocalories

Anything about the same as 2,000 kilocalories.

If the producers are plants / algae, and contain 2,000 kilocalories of energy, the primary consumers, which are the ones eating the plants / algae will obtain about the same amount of energy the producers originally have.

Explanation:

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.