Across
- 3. jawless fish
- 6. skull where there is one fenestrae present
- 7. reptiles and birds
- 10. glands which are connected to hair follicles, producing sebum
- 14. section made up of axial and appendicular skeleton
- 15. pouched marsupials
- 16. germinativum germ layer of skin
- 17. specialized feather used as display in mating rituals
- 18. glandular portion of avian digestive tract
- 19. two parallel forces pulling on bone
- 22. mouth arises from opposite side of Blastopore
- 23. a clade in which groups formed on a basis of nonhomologous characteristics
- 26. scales found on sharks
- 27. flexible rod-shaped in embryos of all chordates
- 28. jaw suspension in which the jaw isn't directly connected to cranium
Down
- 1. features which are similar in appearance
- 2. process by which food is crushed and ground by the teeth
- 4. master switch genes; controls hundreds of secondary genes
- 5. placental mammals
- 8. a light-emitting organ which appears as luminous spots on various marine animals
- 9. animal with cartilaginous shell developed from their ribs
- 11. pigmented cells of skin
- 12. outgrowths of skull beneath the integument which forms a keratinized sheath
- 13. the change in the inherited characteristics of biological populations over successive generations
- 20. responsible for protection, gland secretion, exchanges, sensory signal reception
- 21. multiple generations of tooth replacement
- 24. top layer of skin
- 25. flexible connective tissue found in many areas such as joints between bones, nose