Phylum Arthropoda

The word Arthropod means what?

• Jointed foot

• Soft body

• Segmented body

• Hard shell

What do we call the external body parts that protrude from an organism's body; such as legs, mouthparts, and antennae?

• Appendages

• Organs

• Cells

• Tissues

What is the advantage of jointed appendages?

• Increased flexibility and mobility

• Reduced strength and stability

• Decreased ability to sense the environment

• Limited range of motion

The specialization of regions of the body for specific functions is called:

• Differentiation

• Regionalization

• Specialization

• Localization

Arthropod exoskeletons are made primarily of what carbohydrate polysaccharide?

• Cellulose

• Chitin

• Glycogen

• Starch

The main functions of the exoskeleton are:

• Protection and support

• Respiration and digestion

• Circulation and excretion

• Reproduction and growth

Name the two layers that make up the exoskeleton.

• Epicuticle and Procuticle

• Epidermis and Dermis

• Cuticle and Subcuticle

• Exocuticle and Endocuticle

Arthropods must shed their exoskeleton periodically, what are the two names for this process?

• Molting and Ecdysis

• Shedding and Regeneration

• Exuviation and Metamorphosis

• Casting and Renewal

Explain the molting process.

Answer explanation

The molting process is when an animal sheds its old exoskeleton to make way for a new one. This allows for growth and repair of the exoskeleton.

How is insect molting different from that of spiders & some crustaceans?

• Insects molt by shedding their exoskeleton completely.

• Spiders and some crustaceans molt by shedding their exoskeleton in parts.

• Insects and spiders molt in the same way.

• Crustaceans do not molt.