9.4 Flashcard on Arthropods

Front

How long have horseshoe crabs remained virtually unchanged?

Back

Millions of years.

Front

What percentage of all animal species on Earth are arthropods?

Back

75%.

Front

Which of the following is NOT an example of an arthropod?

Back

Mollusk.

Front

What is the primary function of the exoskeleton in arthropods?

Back

Protection.

Front

Which of the following is a characteristic feature of arthropods?

Back

Jointed legs.

Front

Define arthropods.

Back

Arthropods are invertebrate animals with an exoskeleton, segmented bodies, and jointed appendages.

Front

What are the three main groups of arthropods?

Back

Insects, arachnids, and crustaceans.

Front

What is the role of jointed legs in arthropods?

Back

Jointed legs allow for greater mobility and flexibility.

Front

How do arthropods breathe?

Back

Most arthropods breathe through gills or tracheae.

Front

What is molting in arthropods?

Back

Molting is the process of shedding the exoskeleton to allow for growth.