In a food web,hyenas and vultures are:

Which of the following is a man-made ecosystem?

In the dry weight of living beings,$A$ $\%$ carbon is present. In the oceans,$B$ $\%$ of the total global carbon is dissolved. The total amount of carbon in the atmosphere is $C$ $\%$ of the total global carbon. Identify the correct values for $A, B,$ and $C$.

Which is the correct sequence in the food chain in a grassland?

Which of the following is a producer in the plant kingdom?

Which one of the following animals may occupy more than one trophic levels in the same ecosystem at the same time?