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10 Cards in this Set

  • Front
  • Back
Insect differences from a vertebrate
exoskeleton, small size, segmented body, open circulatory system, tracheal system, upside-down
Differences from other Arthropoda
1 pair of antennae, 3 pairs of legs, most have wings, 3 body regions
Exoskeleton limits size because...
growth occurs in discrete stages (instars)
surface area v. volume problem
Pros of an exoskeleton
protective layer, keeps water in, efficient at a small size, light enough for flight, tubular structure is stronger than rod shape
Purpose of classifying?
store, retrieve and communicate information. in some cases (hierarchical) it also has a predictive element
Species
means "kind"
2 aspects of definition: taxonomic unit and a theoretical concept
Species Concepts
Typological (real essence, apparent characteristics),
Phylogenetic (the smallest aggregation of a group with comparable characteristics) , Evolutionary (ancestor lineage)
Biological (reproductive isolation)
taxonomy
naming and describing of species
systematics
the study / interpretation of natural systems of relationships of biological groups
- can have hypotheses of homology (same descent)
- what structures to identity, what to name
Incomplete metamorphosis
hemiptera, ephemeroptera, orthoptera