Across
- 5. chordates with a backbone
- 6. reads along each naked single strand adding the complementary nucleotide (two words)
- 12. long chains of amino acids
- 16. all living organisms are related to one another (two words)
- 17. organisms that are best adapted to an environment survive and reproduce more than others (two words
- 18. each living species has descended, with changes, from other species over time (three words)
- 19. a record of the history of life on earth
- 22. blood circulates entirely within blood vessels that extend through body (three words)
- 23. structures that concentrate waste and add them to digestive wastes (two words)
- 24. organs that exchange oxygen
- 25. leftover traces of evolution that serve no purpose (two words)
- 27. a hollow muscular organ that pumps blood around the body
- 28. mutation the reading frame of the genetic message is shifted (two words)
- 29. nature provides the variation, humans provide the selection (two words)
Down
- 1. chemical or agent in the environment that causes mutations
- 2. the decoding of mRNA into a protein
- 3. similar anatomy in different types of animals because of common ancestry (three words)
- 4. a nucleic acid that consists of a long chain of nucleotides
- 7. making RNA from a sequence of DNA bases
- 8. the process of change over time
- 9. body cavity that develops from the mesoderm
- 10. blood is only partially contained within a system of blood vessels as it travels through the body (three words)
- 11. untwists the double helix and exposes the complementary strand
- 13. heritable changes in genetic information
- 14. process in which food is broken down outside cells in a digestive system and is then absorbed (two words)
- 15. process through which animals remove ammonia waste
- 20. gene mutations that involve changes in one or a few nucleotides (two words)
- 21. digest food inside specialized cells (two words)
- 26. all animals that lack a backbone