Chapter 28 Mid-term Review Classification and Arthropods

List the 7 Taxa in descending order Kingdom Phylum Class Order Family Genus Species

Why is it necessary to have a system of classification for living things? It makes it easier to study them because we can use general descriptions to understand characteristics of organisms in the same group

List as many general characteristics of arthropods as you can recall. Chitinous exoskeleton Segmented bodies Jointed appendages Open circulatory systems Ventral nerve cord Well-developed senses

List the 4 Classes of Arthropods Arachnida Crustacea Myriapods Insecta

General Description of Arachnids 2 main body segments – cephalothorax and abdomen Lack antennae, have pedipalps Lack mandibles, have chelicerae Use book lungs to breathe Includes spiders and scorpions

General Description of Crustaceans 2 main body segments Exoskeletons contain calcium carbonate and chitin Usually aquatic; breathe using gills 2 pairs of antenna Includes crayfish, crabs, and shrimp

General Description of Myriapods Have lots of segments Use tracheal tubes to breathe Includes centipedes and millipedes

General Description of Insects 3 Main body segments – head, thorax, and abdomen One pair of antenna Breathe with tracheal tubes Very diverse; includes ants, flies, and beetles

What are the two types of metamorphosis? Complete and incomplete

List the 3 stages of incomplete metamorphosis Egg Nymph Adult

List the 4 stages of complete metamorphosis Egg Larvae Pupa Adult

Vocabulary Molting Simple eye Compound eye Antenna Pedipalps Book lungs Tracheal tubes

Vocabulary Molting – replaces the old exoskeleton Simple eye – eye with only one lens Compound eye – eye with many lenses Antenna – sensory structure responsible for touch, taste, smell, and hearing Pedipalps – arachnid appendage that’s like an antenna and also holds food Book lungs – respiratory structure of arachnids Tracheal tubes – respiratory structure of insects