Exam 15: Marine Animals

The evolution of the notochord in chordates permitted a more complex embryonic development.

What class is comprised of nautiluses, octopuses, and squid?

Which worm has a segmented body plan?

What characteristics have made arthropods the most successful phylum? How do these animals grow? Can you think of any disadvantage of growing this way?

What unique feature do all echinoderms have?

Squid are the most intelligent invertebrates.

What is the difference between invertebrate and vertebrate chordates? What organism has characteristics of both?

Photosynthetic autotrophs changed the composition of the atmosphere during the oxygen revolution.

Brittle stars employ a unique evasive technique that involves detaching an arm if grabbed by a predator.

Polychaetes are the most successful worm phyla, being found in terrestrial, aquatic, and marine environments.

What is the most effective anti-drag body plan?

Marine birds usually avoid land unless they are finding food.

What needle-like structure provides a skeletal network for a sponge?

What special tool do tunicates use to obtain more food when suspension feeding?

The teeth in odontocetes are made of baleen.

Which is not a characteristic of an arthropod?

The first fish evolved about 50 million years ago.

What do the simplest vertebrates lack?

What adaptation have only toothed whales developed for prey detection?

How do some predatory sharks find their prey?