Primary carnivores are, most aptly, characterized as:

In a terrestrial ecosystem, a much larger fraction of energy flows through the:

In an aquatic food chain, zooplankton occupy which trophic level?

Identify the incorrectly matched pair:
1. Carnivores -- secondary or tertiary consumer
2. Decomposers -- microbial heterotrophs
3. Herbivores -- primary consumer
4. Omnivores -- molds, yeasts and mushrooms

Each trophic level has a certain mass of living material at a particular time, best called as:

Approximately, what percent of energy is transferred to each trophic level from the lower trophic level in an ecosystem?