Across
- 3. radiation- the diversification of a group of organisms into forms filling different ecological niches.
- 5. does not vary with changes in the environment.
- 6. evolution- the process whereby organisms not closely related, independently evolve similar traits as a result of having to adapt to similar environments or ecological niches.
- 9. the chemical element of atomic number 6, a nonmetal that has two main forms and that also occurs in impure form in charcoal, soot, and coal.
- 10. species-group of individuals which can breed together
- 11. extinction rate-refers to the standard rate of extinction in earth's geological and biological history before humans became a primary contributor to extinctions.
- 13. of a large group of organic compounds occurring in foods and living tissues and including sugars, starch, and cellulose.
- 15. or authority over.
- 18. protein-long filamentous protein molecules.
- 20. protein-are spherical proteins that are somewhat water-soluble.
- 22. instrument for making a recording
- 24. of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome.
- 25. ancestor- a group of organisms share common descent
- 26. both hydrophilic and hydrophobic parts.
- 29. structure- Body part in different species that is similar in function but not in structure that evolved in response to a similar environmental challenge.
- 30. reasoning-a logical process in which a conclusion is based on the concordance of multiple premises that are generally assumed to be true.
Down
- 1. variable-a variable whose value depends on that of another.
- 2. bond-type of covalent bond that joins a carbohydrate molecule to another group.
- 4. close a result comes to the true value
- 7. acid-a simple organic compound containing both a carboxyl and an amino group.
- 8. the branch of biology that deals with the geographical distribution of plants and animals.
- 12. selection-the intentional reproduction of individuals in a population that have desirable traits
- 14. in separate non-overlapping geographical areas.
- 16. influence of closely associated species on each other in their evolution.
- 17. bond-They are derived by reacting an oxoacid with a hydroxyl compound such as an alcohol or phenol.
- 19. any of a class of sugars whose molecules contain two monosaccharide residues.
- 21. anatomy- the study of similarities and differences in the anatomy of different species.
- 23. A process in which the folding structure of a protein is altered due to exposure to certain chemical or physical factors causing the protein to become biologically inactive.
- 27. the action or process of adapting or being adapted.
- 28. supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.