Biology from Unit 2

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Across
  1. 2. Genetic engineering involves inserting a gene into a loop of bacterial DNA, this loops is called a ____.
  2. 5. What would happen to proteins if you heated them too much?
  3. 6. Polar bears' habitat is disappearing due to one abiotic factor- ____ rise.
  4. 8. The process by which a cell makes intself into two new identical cells.
  5. 14. The carbon in fossil fuels is returned to the atmosphere by which process?
  6. 15. Elephants' ears have a ____/____/____ for efficient heat loss.
  7. 19. We are all unique; there is ____ within our species
  8. 21. The nucleus of a human cell contains 46 ____.
  9. 22. Dead organisms are broken down and nutrients recycled by ____ such as bacteria and fungi.
  10. 25. Plants compete for ____ by growing tall and spreading out.
  11. 27. One of the compounds needed by plants.
  12. 29. Plants remove carbon dioxide from the atmosphere by which process?
Down
  1. 1. Many organisms can reproduce asexually, this is called ____.
  2. 3. In food chains, plants are known as ____.
  3. 4. Organisms (usually bacteria) which live in extreme/harsh environments.
  4. 7. Smaller animals are ____ affected by environmental changes in temperature.
  5. 9. Gametes are formed by the process of ____.
  6. 10. Sea lions have a layer of ____ to insulate against the cold.
  7. 11. Weak individuals die, but stronger, better adapted individuals survive to reproduce, this is called ____.
  8. 12. Animals compete for 3 main things- this is one
  9. 13. A random change in DNA sequence is called a ____.
  10. 14. The venus fly trap is a ____ plant: it gets nutrients from animals such as insects.
  11. 16. Animals compete for 3 main things- this is one
  12. 17. Some of the food we eat becomes new tissue in our bodies- fat, muscle etc- this is known as ____.
  13. 18. Many cacti store ____ by swelling up after it rains.
  14. 20. A molecule used in respiration.
  15. 23. Animals compete for 3 main things- this is one
  16. 24. Cacti are ____ to survive in very dry habitats.
  17. 26. In food chains, plants are almost always at the first ____ level.
  18. 28. Cacti have ____ which are reduced to spines, to reduce the loss of water by evaporation.
  19. 30. Spreading ____ is one way that plants compete for space to grow.