3. Modern agroecosystems differ from natural ecosystems in all of the following ways except: A. they (the artificial ecosystems) make the food chain more complex, causing higher biodiversity B. they (the artificial ecosystems) tend to be less complex than the natural ecosystems C. they attempt to suppress ecological succession by allowing only pioneer species to thrive D. they tend to raise crops in monoculture (a single species) rather than multiculture E. they tend to plant crops in neat, orderly rows rather than complex spatial arrangements

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Animal Diversity

Nematodes are commonly known as roundworms. They are free-living, very tiny organisms. They have an elongated and tubular body. These organisms have a nervous system and are mostly act as parasites to both animals and plants.

Platyhelminthes

Platyhelminthes are also known as "flatworms" because as they are dorsoventrally flattened from head to tail. They are invertebrate, soft-bodied, acoelomate, unsegmented and have bilateral symmetry.