Study Guide for test

• Exoskeleton made of chitin• Segmentation• Jointed appendages

1. 1st pair of Appendages on Crustaceans:Chelipeds – used for collecting and manupilating food (catch, pick up, crush, cut)2. Organs that contain silk glands, force silk through these.3. Covers the cephalothorax. Protects the gills4. Respiration (Breathing)5. Grab prey

7. Appendages that contain fangs used to stab and paralyze prey with venom.8. Help with excretion of nitrogenous wastes9. Chemical substances that help insects communicate.10. Help with swimming and assist in reproductionMale – first pair in the shape of a V, alsolarger than female’s.11. Sense the environment

12. A. Chelicerata I. CrustaceaB. Crustacea J. ChelicerataC. Insecta K. ChelicerataD. ChelicerataE. MyriapodaF. CrustaceaG. InsectaH. Crustacea

13. Incomplete – the organism look like immatureadults when they hatch – for example grasshoppers

Complete – the organism does not look like the adult form at all when they hatch. They go through differentforms in their development – for example butterfly.

Incomplete Complete

14.

Crustaceans

Chelicerates

•Body divided intoCephalothoraxAnd Abdomen

•Exoskeleton of chitin

• Some speciesare parasitic

• 2 Pairs of antennae• Mandibles• Use gills orSpiracles for breathing•Mostly aquatic, some are terrestrial.

•No antennae• No mandiblesMouth parts Are fang like• Use book lungsfor breathing.•Mainly terrestrial

Ex. Crabs, Barnacles,Tongue worms, crayfish

Ex. Spiders,Scorpions, horseshoe crabs

15.Help with pollination – crops would not grow w/oPollination. Lady bugs eat aphids that destroy cropsIn Asia and other countries insects are a delicacy.

16. Vectors of diseases like West Nile, Malaria,Dengue fever (mosquitoes), Destroy crops (Locusts)

17. By doing dances – Waggle dance – food is farther away from the hiveRound dance – food is fairly close to the hive.Also use pheromones – chemical substances.

18. Vector19. Mandible20. Tracheal tubes21. Chitin22. Pheromones23. Decapods24. Castes