Chapter 47 Review: Animal Development


  1. In mammals, which structures work as a block to polyspermy?
    1. cortical granules and zona pellucida
    2. zona pellucida and acrosome
    3. acrosome and cortical granules
    4. cortical granules and actin filaments
    5. actin filaments and zona pellucida
  2. In vertebrates, the notochord forms from
    1. ectoderm.
    2. mesoderm.
    3. endoderm.
    4. epiderm.
    5. hypoderm.
  3. In humans, the ________ gives rise to the three germ layers of the blastula.
    1. trophoblast
    2. gastroblast
    3. epiblast
    4. hypoblast
    5. atomicblast
  4. The blastopore in a sea urchin will become the
    1. anus.
    2. ears.
    3. notochord.
    4. nose.
    5. mouth.
  5. The hollow ball of cells produced by cleavage is called
    1. blastocoel.
    2. acrosome.
    3. blastula.
    4. acrocoel.
    5. blastomere.
  6. During fertilization in sea urchin, which structure of the sperm can bind to receptors in the vitelline layer of the egg?
    1. flagellum
    2. actin filaments
    3. acrosome
    4. mitochondria
    5. scolex
  7. After gastrulation, the outer-to-inner sequence of tissue layers in a vertebrate is
    1. endoderm, ectoderm, mesoderm.
    2. mesoderm, endoderm, ectoderm.
    3. ectoderm, mesoderm, endoderm.
    4. ectoderm, endoderm, mesoderm.
    5. endoderm, mesoderm, ectoderm.