Answer:
Clam get 5000 Kcal by eating the plankton
Step-by-step explanation:
In any food chain the amount of energy transferred to the successive trophic level is ten percent of the energy available at the previous trophic level.
Here, manta ray gets 50 kcal of energy by eating the starfish
The amount of energy contained in star fish is equal to
Kcal
Now Starfish gets its energy from clam.
Therefore total energy in clam is equal to
![0.1 * X = 500\\X = 5000](https://img.qammunity.org/2020/formulas/biology/middle-school/vqxq2mgkdmcm78j5of4z4ss0ghyoy4zmei.png)
Therefore, clam get 5000 Kcal by eating the plankton