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A. mutualism
B. commensalism
U. PICUU
ommen
C. parasitism
5. It is an environment where both living and non-living things exist and interact with one another.
A. ecology
B. ecosystem C. community
D. population
6. To what subgroup of arthropods do invertebrates with four pairs of legs belong?
A. echinoderms
B. crustaceans
C. arachnids
D. insect
ascular system,​