Question

1. a) what substance is the exoskeleton made from?______

b) check those with an exoskeleton mouse moth jellyfish millipede

1. a) side trip: support systems. name the three types of support systems found in the animal kingdom.

b) which one is possessed by humans?______
c) what kind of skeleton does an earthworm have?______

1. jointed legs

a) what does the word “arthropod” mean?______
b) check those that have jointed appendages. millipede moth onychophoran mouse jellyfish

1. a) name five ways in which limbs can be specialized.

b) which have many pairs of limbs? mouse moth millipede scorpion

1. based on these data, check all of the following animals that are arthropods. scorpion □moth □onychophoran □mouse □millipede □jelly □
2. a closer look at the arthropod branches

a) how many body parts do insects have?____ how many pairs of legs ____
b) how many body parts do chelicerates have?____ how many pairs of legs __ do chelicerates have antenna?____
c) do crustaceans have antenna?______ give two examples of crustaceans.
d) give two examples of myriapods:______
e) name the 3 lobes of the trilobite body:______

Explanation:

1. a) Chitin is the substance that exoskeletons are made from.

• b) Moths and millipedes have exoskeletons as they are arthropods. Mice have endoskeletons and jelly - fish have hydrostatic skeletons.

1. a) The three types of support systems in the animal kingdom are hydrostatic skeletons, exoskeletons, and endoskeletons.

• b) Humans have endoskeletons.
• c) Earthworms have hydrostatic skeletons.

1. a) “Arthropod” means “jointed foot”.

• b) Millipedes, moths, onychophorans have jointed appendages as they are arthropods or related to arthropods. Mice have limbs but not jointed appendages like arthropods and jelly - fish have no jointed appendages.

1. a) Limbs can be specialized for walking, running, swimming, grasping, and flying.

• b) Millipedes and scorpions have many pairs of limbs. Mice have 4 limbs and moths have 3 pairs of legs.

1. Scorpions, moths, and millipedes are arthropods. Onychophorans are related but not true arthropods, mice are mammals, and jelly - fish are not arthropods.
2. a) Insects have 3 body parts (head, thorax, abdomen) and 3 pairs of legs.

• b) Chelicerates have 2 body parts (cephalothorax and abdomen) and 4 pairs of legs. They do not have antennae.
• c) Crustaceans have antennae. Examples are crabs and lobsters.
• d) Examples of myriapods are centipedes and millipedes.
• e) The 3 lobes of the trilobite body are the cephalon, thorax, and pygidium.

Answer:

1. a) Chitin

• b) moth, millipede

1. a) Hydrostatic skeletons, exoskeletons, endoskeletons

• b) Endoskeleton
• c) Hydrostatic skeleton

1. a) Jointed foot

• b) millipede, moth, onychophoran

1. a) Walking, running, swimming, grasping, flying

• b) millipede, scorpion

1. scorpion, moth, millipede
2. a) 3 body parts, 3 pairs of legs

• b) 2 body parts, 4 pairs of legs, No
• c) Yes, Crabs, Lobsters
• d) Centipedes, Millipedes
• e) Cephalon, Thorax, Pygidium