Question

If the energy transferred to a tertiary consumer in a food chain is 10 J, how much energy was available to the primary consumer?
(a) 100 J
(b) 500 J
(c) 1000 J
(d) 5000 J

Answer 1

Available energy to the primary consumer was 1000 J, option C is correct.

Explanation:

1. Energy transfer to third consumer is 10% of energy possess by second consumer.

  So

  (10% of energy of second consumer) = Energy of third consumer

  $(\frac{10}{100})\times Energy of second consumer = 10$

after calculation

 Energy possess by second consumer = 100 J

2. Energy transfer to second consumer is 10% of energy possess by first consumer.

So

  (10% of energy of first consumer) = Energy of second consumer

  $(\frac{10}{100})\times Energy of First consumer = 100$

  after calculation

Energy possess by First consumer = 1000 J

Answer 2

Answer:

C is the right choice for your question