Baotou weather 1

Analysis: (1) Green plants use carbon dioxide and water as raw materials for photosynthesis. Through photosynthesis, organic matter is stored in plants, and oxygen is provided for animals and plants to breathe, thus reducing the content of carbon dioxide and maintaining the balance of carbon and oxygen in the biosphere. Breathing is just the opposite of photosynthesis, releasing carbon dioxide and water and decomposing organic matter in the body. Therefore, ① indicates photosynthesis and ② indicates respiration.

(2) As can be seen from the curve in the figure, this physiological activity is influenced by light and temperature. The stronger the light, the higher the temperature and the stronger the physiological function, so it means photosynthesis.

(3) There are producers, consumers and decomposers in the ecosystem. Producers provide organic matter for the survival of animals and plants, and at the same time provide oxygen for the breathing of animals and plants through photosynthesis, and absorb carbon dioxide released by other animals and people. Carbon dioxide, inorganic salts and water formed by decomposition of animal and plant remains return to nature, providing nutrients for plant growth. So through the above analysis, A stands for producer, B stands for consumer, and C stands for decomposer.

So the answer is: (1) photosynthesis; Carbon dioxide; Carbon-oxygen (or carbon dioxide and oxygen); Breathe; ? (2)①; (3) producers, consumers and decomposers