In an ecosystem, caterpillars eat grass. Field mice eat the caterpillars and seeds from the grass. Snakes eat the mice. Hawks eat both snakes and mice. This would be considered a (n)
Ecology is best defined as the study of#N#A. populations.#N#B. rate of population changes. C. communities.#N#D. how populations are restricted by environmental resistance.#N#E. organisms as they interact with other organisms and with their physical surroundings.
Most natural food chains are only four or five links long, rarely more. The number of trophic levels is limited because