Invertebrates Unit Test

All animals

• have cell walls made of chitin

• obtain food by absorption

• are prokaryotic

• are heterotrophic

During the Cambrian explosion approximately 535 to 525 million years ago,

• all modern species of animals suddenly appeared

• animals rapidly diversified in the oceans

• great forests produced peat layers that were later transformed into coal

• a massive volcanic eruption nearly wiped out life on Earth

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Most of the animals alive today are

• vertebrates

• choanoflagellates

• really colonies of protist cells

• invertebrates

Which animal displays radial symmetry?

• a sea anemone

• a fish

• a lobster

• an earthworm

Which statement about circulatory systems is true?

• Vertebrates have an open circulatory system, while arthropods have a closed circulatory system

• Arthropods have an open circulatory system, while annelids have a closed circulatory system

• Vertebrates have an open circulatory system, while molluscs have a closed circulatory system

• Vertebrates have an open circulatory system, while annelids have a closed circulatory system

A typical sponge is best described as a

• slow-moving suspension feeder with a true coelom

• sessile suspension feeder with a bilateral symmetry

• slow-moving carnivore with no true tissues or symmetry

• sessile suspension feeder with no true tissues or body symmetry

Which statement regarding cnidarians is true?

• Cnidarians have three true tissue layers

• The more stationary cnidarian body form, which is cylindrical with a ring of tentacles, is the medusa

• Cnidarians and herbivores and can be destructive grazers on seaweeds

• The digestive and circulatory compartment of cnidarians is called the gastrovascular cavity

While wading in the ocean, you look down into the water and notice an umbrella-shaped, translucent animal. It swims by pulsing its body, and long tentacles trail behind it. One of them brushes your leg. Ouch! You feel a burning sensation where it touched you. To what phylum does this creature probably belong?

• Cnidaria

• Platyhelminthes

• Porifera

• Mollusca

A bilaterally symmetrical, worm-like animal that has a complete digestive tracts and a cuticle could be a member of which phylum?

• Chordata

• Annelida

• Cnidaria

• Nematoda

Tags

NGSS.MS-LS4-2

Which characteristic is typical of molluscs?

• a rasping organ called the radula

• a gastrovascular cavity with only one opening

• an internal skeleton and segmented body plan

• a sessile lifestyle