Chapter 9- Will Broadway
Across
- 2. whales toothless whales
- 4. internal air sacs that allow absorption of oxygen directly from the air
- 5. flightless, with wings modified into stubby "flippers"that allow them to "fly" underwater
- 9. a membrane that connects it to the womb
- 13. giving birth to live young
- 14. semiaquatic animals that spend a good part of their lives on drifting ice in the Arctic
- 15. glands get rid of excess salts
- 17. organisms that lose metabolic heat to the environment without it affecting their body temperature
- 21. organisms that retain some metabolic heat, which raises their body temperature
- 22. birds have narrow wings and a long, forked tail
- 24. a complex nucleic acid that contains a cells genetic information
Down
- 1. large pinniped with a pair of distinctive tusks protruding down from the mouth
- 2. on top of the head, forming a single or double opening
- 3. organisms able to keep their body temperature more or less constant regardless of the temperature of the environment
- 6. four-footed
- 7. must keep themselves moist, most lay their eggs in water
- 8. comprise a large group of seabirds with distinctive tube-like nostrils and heavy beaks that are usually curved at the tip
- 10. have a unique pouch below their large beaks
- 11. planktonic, shrimp-like crustaceans
- 12. different species develop similar structures because they have similar lifestyles
- 16. graceful flyers that hover over their prey before plunging for it
- 18. black, long-necked seabirds that dive and pursue their prey
- 19. smallest marine mammal
- 20. snakes their bodies are laterally flattened, and the tail paddle-shaped for swimming
- 23. particularly thick in dry coastal regions and islands near very productive waters