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Deuterostome Animals (Grades 11-12)

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Deuterostome Animals

Which is NOT a characteristic of deuterostome animals?
  1. radial cleavage
  2. three germ layers
  3. more species than protostomes
  4. a blastopore that becomes an anus
Besides the echinoderms and chordates, which other clade comprises the deuterostomes?
  1. vertebrates
  2. cephalochordates
  3. hemichordates
  4. urochordates
                         are deuterostomes that posses a dorsal hollow nerve cord, a post-anal tail, a notocord, and gills at some point in their development.
Birds are believed to have evolved from                         .
Which feature allows for heat retention in a vertebrate?
  1. leathery skin on sharks
  2. feathers on birds
  3. watertight skin on reptiles
  4. scales on fish
What is the main difference between amphibians and reptiles?
  1. Amphibian eggs can survive out of water, while reptile eggs cannot.
  2. Amphibians breathe using lungs, while reptiles breathe using gills.
  3. Amphibians can give live birth, while reptiles can only lay eggs.
  4. Amphibians have a permeable skin, while reptiles have thick skin.
Which characteristic is NOT found in the chordates?
  1. external skeleton
  2. bilateral symmetry
  3. gill slits during development
  4. notochord
Which is a characteristic of the echinoderms?
  1. bilateral symmetry
  2. pharyngeal gill slits
  3. internal skeleton of calcified plates
  4. a well-developed brain
Which statement about marsupial mammals is true?
  1. They are the only egg-laying mammals.
  2. Their offspring finish development within a special pouch.
  3. Their mammary glands have no nipples.
  4. They are found only in Australia.
When determining phylogenies among organisms, why is knowing what the larval forms look like an important piece of information?

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