Nahom Abraha-Biology Unit 8 Vocabulary Words

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Across
  1. 3. Generation, the hypothetical process by which living organisms develop from nonliving matter.
  2. 5. Selection, the process wherein heritable traits increase an organism's chances of survival and reproduction.
  3. 6. Immunity, results when exposure to a disease organism triggers the immune system to produce antibodies to that disease.
  4. 9. A symbiotic relationship where one organism lives inside the other.
  5. 10. Evolution is a change in the heritable characteristics of biological populations over successive generations.
  6. 11. of Superposition, a major principle of stratigraphy states that within a sequence of layers of sedimentary rock, the oldest layer is at the base and that the layers are progressively younger with ascending order in the sequence.
Down
  1. 1. Structure, similar physical features in organisms that share a common ancestor, but the features serve completely different functions.
  2. 2. Immunity, provided when a person is given antibodies to a disease rather than producing them through his or her own immune system.
  3. 4. A drug used to treat infections caused by bacteria and other microorganisms.
  4. 7. A preparation that is used to stimulate the body's immune response against diseases.
  5. 8. Structures, a rudimentary biological structure that was not rudimentary in the ancestors of their bearer.