Evolution & Natural Selection

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Across
  1. 2. a genetically determined characteristic
  2. 7. a group of organisms that are closely related and can mate to produce fertile offspring
  3. 11. type of virus called a ____ and has a complex replication cycle
  4. 13. the formation of new species as a result of evolution
  5. 15. singular,pilus
  6. 16. when environmental conditions are harsh, some types of bacteria produce a structure called an ____
  7. 17. the division of a cell into two genetically identical cells
  8. 18. the viral DNA inserts, or integrates, into a chromosome in a host cell
  9. 19. a nonliving strand of genetic material within a protein coat
  10. 20. the host cell makes many copies of the viral RNA or DNA
Down
  1. 1. sometimes called eubacteria
  2. 3. the human practice of breeding animals or plants that have certain desired trait
  3. 4. the process in which inherited characteristics within a population change over generations such that new species sometimes arise
  4. 5. a characterisitic that improves an individuals ability to survive and reproduce in a particular environment
  5. 6. some prokaryotes secrete a layer of polysaccharides around the cell wall, forming a ____
  6. 8. some prokaryotes exhibit a form of reproduction called
  7. 9. infectious particle or ____
  8. 10. the outer layer of all viruses is made of proteins
  9. 12. their genes are found on a large, circular chromosome in an area of the cell called the ____
  10. 14. the period between the birth of one generation and the birth of the next generation