Chapter 7 Part: Arthropods

Question 1

Characteristics of Arthropods

Answer 1

exoskeleton; joint appendages; jointed body; must molt to grow.

Question 2

Class: Arachnids

Answer 2

Spiders, scorpions, ticks

-8 legs; two body regions.

Question 3

Class: Crustaceans

Answer 3

crayfish, shrimp, crabs, lobster sow bugs, daphnia

-4 antennae; mostly aquatic, 2 body regions many legs

Question 4

Insects

Answer 4

beetles, flies, bugs, bees, butterflies

-6 legs; 3 body regions; wings; 2 antennae

Question 5

Centipedes

Answer 5

centipedes

-worm-like body; 2 legs per body segment

Question 6

Millipedes

Answer 6

millipedes

-worm-like body; 4 legs per body segment

Question 7

Miscellaneous information #1 on Arthropods

Answer 7

-All arthropods must molt (shed old exoskeleton) to grow
-I.D. butterfly wing scales
-I.D. bee wing hooks on a dissecting microscope.
-I.D. anatomical structures seen on spider, scorpion, grasshopper, and crayfish (e.g. fangs, spinnerets, mandibles, gills etc.
-Insects breathe through spiracles (mainly in abdomen) which connect to a series (tracheal) tubes throughout the organism.
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Question 8

Miscellaneous information #2 on Arthropods

Answer 8

• Many diseases are transmitted to people by arthropod “vectors”: e.g. malaria (mosquito); epidemic typhus (lice) and bubonic plague (rate fleas)
• Mosquito control; strict health and hygiene practice (lice control); and sanitation as trash disposal as well as vector control help to prevent these three vectors - transmitted diseases in the U.S.
• I.D. male/female grasshoppers, spiders and crayfish, and names of structures (ovipositors, pedipalps, swimmerets).
• the two major characteristics of animals in the phylum arthropods are jointed appendages and an exoskeleton
• Most insects go through “complete metamorphosis”: egg; larvae; pupa; adult