The component of the Earth's atmosphere of many gasses, is decreases due to the process of photosynthesis, would be the carbon dioxide component, CO2 gas, as plants and other primary producers, utilize this gas, a product for which is breathed out in plants and animals, to incorporate into the second step of photosynthesis. Ultimately to make sugars, glucose.
C. <em>A process of change in organisms over a period of time</em>
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The answer is vascular plants.
Vascular plants have <span>specialized tissues that can transport fluids - vascular tissue. This tissue consists of</span><span> xylem and phloem. Xylem transports water and minerals from the root to the upper parts of the plant. Phloem transports food and nutrients from the leaves, where they are produced, to the growing or storage parts of the plants. </span>
The ratio of c-14 to c-12 is consistent over time.
