Across
- 4. the process of cell specialization in the structure and function
- 6. organs of animal body develop from specific portions of the three embryonic germ layers
- 8. a period of rapid cell division without growth, which results in the production of a large number of cells called blatomeres
- 9. rearrangements responsible for changes in both the shape and position of cells
- 10. Transforms the blastula into a gastrula, which has primitive digestive cavity and three embryotic germ layers
Down
- 1. Cleavage planes usually follow a specific pattern relative to the animal and _________ of the zygote.
- 2. Brings together the nuclei of sperm and egg, forming a diploid zygote, and activates the egg, initiating embryonic development
- 3. Cell adhesion molecules such as ____ help hold cells together in tissues.
- 5. is triggered when the sperm meets the egg, releases hydrolytic enzymes that digest material surrounding the egg
- 7. Fibronectin and other ________ located on cell services are important for cell migration and appear to affect cadherin function