Chapter 13Section Review

ARTHROPODS

• Jointed appendages

• Segmented bodies

• Exoskeletons

Insects• Three body regions

– Head• Antennae• Eyes (Single or Compound)• Mouth

– Thorax• Three pairs of legs• Sometimes one or two pairs of wings• Spiracle

– Abdomen• Reproductive structures• Spiracles

Arachnids

• Two body regions– Cephalothorax– Abdomen

• Four pairs of legs

• No antennae

• Many have venom glands, stingers or fangs

Centipedes and Millipedes

• Long bodies

• Many segments and legs

• Antennae

• Simple eyes

Crustaceans

• Crabs

• Crayfish

• Shrimp

• Barnacles

• Pill Bugs

• Water Fleas

•5 pairs of legs•Antennae•Mandibles•Swimmerets

Answer to Question

What are the advantages and disadvantages of an exoskeleton?

Advantages

• Prevents dehydration

• Supports and protects body

Disadvantages

• Body outgrows exoskeleton

• Animal is vulnerable to predators while new exoskeleton hardens.

Answer to Question

Compare and contrast the stages of complete metamorphosis and

incomplete metamorphosis.

Complete Metamorphosis

• The insect begins as an egg.

• The egg develops into a larva.

• The larva develops into a pupa.

• The pupa develops into an adult.

Incomplete Metamorphosis

• The insect begins as an egg.

• The egg develops into a nymph.

• The nymph molts several times and develops into an adult.

List four ways arthropods obtain food.

Answer to Question

Ways Arthropods Obtain Food

1. Chewing

2. Piercing

3. Sucking

4. Lapping up nectar

Blood Sucking Tick

Nectar Lapping Butterfly

Bug Chewing Praying Mantis

Answer to Question

Evaluate the impact of arthropods.

Why are they important?

Why are Arthropods Important?

• They are an important food source for other animals.

• They pollinate crops.

• They prey on harmful organisms.

• They are used in the medicine industry.

• They can also destroy crops, carry disease and destroy property.

Answer to Question

Make an events chain concept map of complete metamorphosis and of incomplete metamorphosis.

Incomplete Metamorphosis

EGG

NYMPH

ADULT

Complete Metamorphosis

EGG

LARVA

PUPA

ADULT