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Across 4. A relatively constant stable conditon 8. Why birds fly south for the winter.(3wrds) 11. Organisms that are made of many cells 14. Change over time. 15. How light energy is converted into chemical energy 18. Stages of an organisms development (2wrds) 19. The process by which organisms breakdown food to carry out the functions of life 20. What a botanist would study 22. The study the living world 23. Source of energy for plants, algae, and some bacteria 24. Number of cells needed for sexual reproduction 26. Why offspring resemble their parents (2wrds) 27. Reproduction that occurs from a single cell.

Down 1. Study fossils or remains of past lives 2. A single member of a population 3. Why we sweat when we get cold. 5. Traits resulting from asexual reproduction 6. Needed to grow, develop, and reproduce 7. How organisms produce new organisms 9. Another type of change besides growth 10. What makes up tissues, organs, and organ systems.(3wrds) 12. Smallest units of life 13. Organisms that are only 1 cell 16. A person who studies life 17. Level of organization where all life exists 21. Study of animals 25. Genetic material responsible for the traits we inherit