food chain:The simplest representation of energy in a community. At the base is energy stored in plants, which are eaten by small organisms, which in turn are eaten by progressively larger organisms; the food chain is an oversimplification in that most animals do not eat only one type of organism.
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food web:the interconnected feeding relationships in an ecosystem. These relationships can be complex; some organisms may feed on more than one trophic level, or changes may occur depending on a species' life history stages or the availability of food.
false statement about producers: this is because some of the goods and services which people in any economy consume are produced by producers in other countries and imported.
Xylem carries water from the roots to the leaves. Phloem carries minerals from the roots to the leaves. Xylem carries sugars from the flowers to the stems. Phloem carries water from the flowers to the stems.