Biology Final

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Across
  1. 3. The variety and variability of life on Earth; a region’s biodiversity is measured at three
  2. 6. the scientific study of life
  3. 7. organisms can use
  4. 9. the nucleic acid that carries hereditary information in its sequence; double helix
  5. 10. the rate of change in population size, expressed in terms of the increase in population per existing individual; may be calculated by subtracting the population’s per capita death rate from its per capita birth rate
  6. 11. genetic diversity within species, species diversity, and ecosystem diversity
  7. 14. a heritable trait that improves an organism’s chances of surviving and producing offspring
  8. 15. an organism that breaks down decaying organic matter into simpler compounds that
  9. 16. as a subunit of RNA and as a coenzyme in many reactions;
  10. 18. a species that has a disproportionately large effect on community structure relative to its abundance
  11. 20. the cumulative genetic change in a population of organisms from generation to generation; leads to differences among populations and explains the origin of all of the organisms that exist today or have ever existed
  12. 22. a measure of the number of hydrogen ions in a water- based fluid
  13. 24. the average number of individuals in a population per unit area
  14. 26. a nucleotide that consists of an adenine base, a ribose sugar, and three phosphate
  15. 27. a sampling method in which the number of members of a population occupying a sample area or volume of their range is counted directly in order to estimate the size of the population
  16. 28. an ecological relationship in which one species captures, kills, and eats another
  17. 29. an ecological relationship in which two organisms try to obtain the same resource
  18. 30. an organism that makes its own food from abiotic sources, such as sunlight or inorganic materials
Down
  1. 1. a close ecological relationship in which one species lives in or on another species in a commensal, mutualistic, or parasitic relationship
  2. 2. consists of two chains (strands) of deoxyribonucleotides (adenine, guanine,
  3. 4. over a period of time; exponential growth produces a characteristic J-shaped curve
  4. 5. a complex system of feeding relationships in an ecosystem
  5. 6. a substance that accepts hydrogen ions in water
  6. 8. a method in which a sample group of members of a population are captured and marked; the proportion of marked organisms in a second group, captured at a later time, is used to estimate the size of the population
  7. 12. an organism that gets its energy and nutrients from eating other organisms
  8. 13. a factor that limits the possible solutions that could be developed to solve a problem
  9. 17. the group of organisms in an ecosystem which occupy the same level in a food chain
  10. 19. a population growth pattern in which a population grows at a constant rate of
  11. 21. carrier
  12. 23. a substance that releases hydrogen ions in water
  13. 25. a standard that an engineering solution must meet to be considered successful