Biology

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Across
  1. 4. humans select the survival of organisms with desirable traits
  2. 11. how many divisions does meiosis have?
  3. 13. lipids store...
  4. 15. physical appearance of an individual for a trait
  5. 17. allows large, polar molecules to pass through the cell membrane
  6. 19. what does secondary succession have that primary succession does not?
  7. 20. the phase where chromosomes line up in the middle of the cell
  8. 21. lowest trophic level in a food pyramid
  9. 22. what holds together sister chromatids?
  10. 25. monomer for protein
  11. 26. type of cell with no nucleus
  12. 27. water molecules sticking to other molecules
  13. 29. place on enzyme where substrates fit
  14. 30. substances changed during a chemical reaction
Down
  1. 1. when a small bud forms and falls off an organism and becomes a new organism
  2. 2. what blood type can be given to any other blood type
  3. 3. organelle in an animal cell that stores water and nutrients
  4. 5. how many divisions does mitosis have?
  5. 6. external factors that cause mutations
  6. 7. relationship where both species benefit
  7. 8. are gametes haploid or diploid?
  8. 9. the diffusion of water from a high to low concentration
  9. 10. cellular respiration happens in the...
  10. 12. the DNA nucleotides sugar is...
  11. 14. monomer for lipids
  12. 16. change over time in a population of species
  13. 18. synthesize proteins
  14. 23. how many kingdoms are there in the modern classification system?
  15. 24. what is the first step in photosynthesis called?
  16. 28. all living things are made of...