BJU Life Science: Ch 12 Life Science: Invertebrates

No invertebrate has

• 1. a skeleton

• 1. a backbone

• 1. tissues

• 1. wings

Which phylum has the most animal species?

• Arthropoda

• 1. Insecta

• Annelida

• Porifera

What kind of symmetry do flatworms have?

• Spherical

• Radial

• Unilateral

• 1. Bilateral

Which of the following are closely related?

• Spicules

• Nematocysts

• 1. Collar cells

• 1. Flagella

What characteristic distinguishes earthworms from worms in other worm phyla?

• 1. Parasitic habit

• 1. Round shape

• 1. Segmented body

• 1. Hooks and suckers

What does an octopus use to move quickly through the water?

• Fins

• Siphon

• 1. Suction disks

• 1. Tentacles

The tiny bristles that an earthworm uses for movement are

• Septa

• Casts

• Setae

• Cuticles

Clams obtain food by

• 1. Biting it with their shells

• 1. Filtering it from the water

• 1. Photosynthesis 

• 1. Sucking blood from captured prey

Animals

• 1. are eukaryotic

• 1. lack tissues

• 1. are consumers

• 1. reproduce sexually

Arthropods have

• 1. exoskeletons

• 1. nematocysts

• 1. jointed appendages

• 1. closed circulatory systems