Question

How much energy is available at the third trophic level if the first trophic level has 300,000

Answer 1

Answer:

The answer is C

Explanation:

It is given that every trophic level wil lose 90% rate of kilocalories. So we know that every level will only gain 10% of kilocalories and we can do it step by step :

First trophic level,

300 000 kilocalories

Second trophic level, gain only 10%

(10/100) × 300 000

= 30 000 kilocalories

Third trophic level,

(10/100) × 30 000

= 3000 kilocalories

(Hope you can understand)