What are two characteristics that scientists use to differentiate insects?

3 main tagmata. Insect bodies are divided into three main parts: head, thorax, and abdomen. The thorax is where all the legs and wings are attached.

Gas exchange organs: Tracheae. The tracheal breathing system is one of the key adaptations enabling insects to live on land. Some insects have aquatic larval forms, which have gills

metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (protoliths), without the protolith melting into liquid magma (a solid-state change). the change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. i hoped i !