Arthropod Basics
What type of skeleton do arthropods have?
Exoskeleton
What is believed to be the ancestor of arthropods?
Worm-like ancestor
What do insects have that many other arthropods do not?
Wings
Which arthropod group includes crabs and lobsters?
Crustaceans
What type of reproduction do most arthropods use?
Sexual Reproduction
What material is the exoskeleton made of?
Chitin
What environments were they adapted to? (3)
Water, Air, and Land
What part of an arthropod’s body is responsible for movement like walking or grabbing?
Appendages
Which group includes spiders and scorpions?
Arachnids
What is the term for the type of metamorphosis where an insect goes through stages like egg, nymph, and adult?
Incomplete Metamorphosis
What do arthropods need to do to grow?
Molt/Ecdysis
What period did arthropods first appear?
Cambrian Period
What do arthropods use to sense their environment?
Antennae
Which group of arthropods has six legs and three body parts?
Insects
Give an example of an animal that goes through complete metamorphosis.
Butterfly
What kind of circulatory system do arthropods have?
Open
What are the 3 parts of body segmentation?
Head, thorax, abdomen
Name the 2 types of eyes they have and how they work.
Compound eyes - Many lenses form an image
Simple eyes - Detect light for direction (not a complete image)
What are the two main groups of myriapods (Chilopoda & Diplopoda)?
Centipedes and millipedes
What type of fertilization do most arthropods use?
Internal Fertilization
What symmetry do arthropods have?
Bilateral symmetry
What has their exoskeleton helped them with over time?
Protects their body & reduces water loss
What is it called when the head and thorax are joined together?
Cephalothorax
What class includes animals that resemble spiders but are not true spiders and are not part of Arachnida?
Pycnogonida
In what kind of environment are arthropod eggs often laid to prevent them from drying out?
Moist Soil