Suppose you use a dissecting microscope to observe organisms that have colonized discs of densely packed, fibrous wood (Masonite plates) that have been submerged in 6 inches of lake water for 8 weeks. You see insect cases (protective shelters), insect larvae, and newly emerged insects with wings. You determine that you are looking at an insect species

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The presence of insect cases, larvae, and newly emerged insects with wings suggest that the insects are undergoing complete metamorphosis, which includes an egg, larval, pupal, and adult stage. Insects that undergo incomplete metamorphosis do not have a distinct pupal stage and usually have nymphs that resemble smaller versions of the adult. The body plan of radial symmetry pertains to organisms like jellyfish and starfish, and not insects. Incomplete digestive tracts refer to organisms that have only one opening for both ingestion and excretion, which is not specific to insects.

Suppose You Use a Dissecting Microscope to Observe Organisms That