Question

When analyzing a microscopic model of a freshwater ecosystem, what is one heterotroph you are likely to encounter?

a. diatoms
b. arthropods
c. desmids
d. grass

Answer 1

In a microscopic model of a freshwater ecosystem, you are likely to encounter **b. arthropods** as a heterotroph. Heterotrophs are organisms that obtain their food by consuming other organisms, and arthropods, which include various small invertebrates like water fleas (e.g., Daphnia), fit this description. In contrast, diatoms and desmids are types of algae (autotrophs), while grass is a terrestrial plant (also an autotroph).