Across
- 3. hollow muscular organ that pumps blood around the body
- 4. organs that exchange oxygen
- 8. a system in which a product or result of a process limits the process itself
- 9. blood is only partially contained within a system of blood vessels as it travels through the body
- 13. animals that lack a back bone
- 15. segments of DNA serve as templates to produce complementary RNA molecules
- 16. gene mutations that involve changes in one or a few nucleotides
- 20. process in which food is broken down outside cells in a digestive system and is then absorbed
- 22. sepearate waste and extra water from the blood
- 23. respiratory structure of aquatic animals
- 25. organisms that are best adapted to an environment survive and reproduce more than others
Down
- 1. process of change over time
- 2. selection humans provide the selection
- 5. heritable changes in genetic information
- 6. untwists the double helix and exposes complementary glands
- 7. digest food inside specialized cells that pass nutrients to other cells by diffusion
- 10. any number of imaginary planes drawn through the center of the body could divide the body into equal halves
- 11. blood circulates entirely through blood vessels that extend through body
- 12. animals removing ammonia waste
- 14. s nucleic acids that consists of a long chain of nucleotides
- 17. tube like excretory structures that filter body fluid
- 18. decoding of mRNA to protein
- 19. long chains of amino acids
- 21. chemical or agent in the environment that cause mutation
- 24. chordate with a backbone