Question

You are presented with a simple food chain:

Answer 1

Answer:

Mass of phytoplanktons will be  $1,00,000$ Kg

Explanation:

As we know

$1$ Kg of body mass is equal to $8.98 * 10^{17}$ Joules

So energy contained in $10$ kg of fish which lies at the top of the food chain is

$8.89 * 10^{17} * 10 = 8.89 * 10^{18}$

Now energy with small predatory fish be X

$\frac{1}{10} * X = 8.89 * 10^{18}\\= 8.89 * 10^{19}$

Let the energy with planktivorous fish be Y

$\frac{1}{10} * Y = 8.89 * 10^{19}\\= 8.89 * 10^{20}$

Let the energy with zooplankton be Z

$\frac{1}{10} * Z = 8.89 * 10^{20}\\= 8.89 * 10^{21}$

Let the energy with phytoplankton be A

$\frac{1}{10} * A = 8.89 * 10^{21}\\= 8.89 * 10^{22}$

Mass of phytoplanktons will be

$\frac{8.98 * 10^{22}}{8.98 * 10^{17}} \\10^5\\= 1,00,000$

Mass of phytoplanktons will be  $1,00,000$ Kg