Unit 7

Organisms on coral reef compete for space and light.

• True

• False

Which of the following is not a major factor that influences reef growth?

• color

• pollution

• temperature

• light

What type of relationship does coral have with zooxanthellae?

• symbiotic

• parasitic

• commensalistic

• harmful

Identify the type of symmetry cnidarians have.

• Radial

• Bilateral

• Assymetrical

All cnidarians are

• autotrophs

• heterotrophs

• producers

Identify the body form pictured below:

• Medusa

• Polyp

Identify the body form pictured below.

• Polyp

• Medusa

Which statement best describes the nematocyst?

• An organelle consisting of a coiled, thread-like stinger used to ward off enemies or to capture prey.

• An organelle consisting of a coiled, thread-like stinger used to attract mates.

• A gastrovascular cavity used to ward off enemies and capture prey.

• A canal extending from the four-chambered stomach to distribute food.

Identify the type of symmetry Phylum Porifera has.

• Asymmetrical

• Radial

• Bilateral

How do sponges obtain food?

• Filter feeders

• Apex predators

• Photosynthesis

• Decomposers