Unit 7 Annelida

In the worm's digestive system, which of the following is the thick, muscular sact that grinds food?

• Esophagus

• Gizzard

• Intestine

• Crop

Which of the following do leeches use in their saliva to prevent blood from clotting?

• Anaesthetic

• Anticoagulant

• Metanephridia

• Chloragogen cells

What are the short, stiff, needle-like bristles that help some annelids move?

• Parapodia

• Bristles

• Setae

• Calciferous glands

What is metamerism

• Having the right and left sides of the body mirror each other

• A division of the body into a series of segments.

• Having one continous body plan without repeating segments

• Looking at the man in the mirror.

Segmentation first evolved so organisms could be better at what?

• Hunting prey

• Burrowing

• Reproducing

• Digesting

Which of the following has the correct order that food passes through an earthworm?

• gizzard - esophagus - pharynx - crop

• pharynx - esophagus - crop - gizzard

• esophagus - pharynx - crop - gizzard

What is the name of the large reproductive organ on the external surface of an earthworm?

• Chloragen

• Receptacle

• Bandaid

• Clitellum

If present, which type of skeleton is found in worms?

• Longitudinal
• Circular
• Exoskeleton
• Hydrostatic

Which phylum contains segmented worms like earthworms and leeches?

• Platyhelminthes
• Nematoda
• Annelida

Worms take in oxygen through their

• lungs

• skin

• hearts

• mouth