Question

Which of the following represents a possible food chain in a pound :

$\begin{array}{ccc}\text{Primary}& \text{Primary}& \text{Secondary}\\ \text{Producers}& \text{consumers}& \text{consumers}\\ \text{(a) green algae}& \text{fish}& \text{mosquito larvae}\\ \text{(b) fish}& \text{green algae}& \text{mosquito larvae}\\ \text{(c) mosquito larvae}& \text{fish}& \text{green algae}\\ \text{(d) green algae}& \text{mosquito larvae}& \text{fish}\end{array}$

Answer 1

(d) green algae, mosquito larvae, fish

In a pond, green algae are the primary producers. Green algae are consumed by mosquito larvae, which therefore become the primary consumers. Mosquito larvae are consumed by fish, which then become the secondary consumers.