Bottom to top is: 1. troposphere 2. stratosphere 3. mesosphere 4. thermosphere
Answer:
Cyanobacteria were photosynthetic and slowly changed the earth's atmosphere from CO2 rich to O2 rich. Photosynthetic cyanobacteria evolved by 3.5 billion years ago and greatly modified earth's atmosphere.
Answer:
Answer is option C.
Mountain glaciers are the water reservoir that could always provide fresh water on earth.
Explanation:
Glacier, the largest fresh water reservoir on earth is an important component in the water cycle of earth. They are huge mass of ice formed over many years, where the accumulation of snow and ice exceeds ablation (melting and sublimation). About 69% of the world's fresh water is stored in glaciers. Glaciers are made from compressed snow, which is salt-free because it is formed from water vapor in the atmosphere. When the water evaporates, it left the salt behind. Also the pollution level of glaciers are very low compared to other water reservoirs like lakes, rivers, seas etc.
Una proteína de canal , un tipo de proteína de transporte, actúa como un poro en la membrana que permite que las moléculas de agua o pequeños iones pasen rápidamente a través de la membrana. Las proteínas de canal de agua (acuaporinas) permiten que el agua se difunda a través de la membrana a un ritmo muy rápido
Explanation:
