These are environmental conditions that keep a

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19. These are environmental conditions that keep a population from increasing in size and help balance ecosystems. A. population sizesB. DensityC. limiting factorsD. carrying capacity 20. It is the number of individuals per size of the area 21. An increase in the earth’s temperature from the rapid buildup of carbon dioxide and other gases. 22. It occurs when the last member of the species dies. 23. It is commonly known as acid precipitation. A. rainB. typhoonC. acid rainD. none of the above 24. It is the process of food making done by plants and other autotrophic organisms. 25. The end product of photosynthesis are oxygen and
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26. A part of a leaf which found on the lower surface that allows the entrance of carbon dioxide needed for photosynthesis. 27. It is considered as the powerhouse of the cell. A. chlorophyllB. stomataC. mitochondrionD. none of the above 28. These are green pigments stored in the chloroplast. 29. Photosynthesis is affected by the factors such as 30. 31. Answer Key
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1. C 2. A 3. D 4. A 5. B
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