electricity, chemistry, and astronomy
The answer is the letter B. Electrical signals.
*Our brain and body communicates with each other by sending messages in the form of electrical signals.
To keep in the stored enzymes so it can keep synthesizing at night, even when there is no sunlight. -- Stomata serve two main functions - they allow carbon dioxide to reach the cells in the leaf where the majority of photosynthesis takes place and they allow water to be transpired out off the leaf. During the day, stomata are generally open to allow photosynthesis to take place as quickly as possible. At night, when the lack of light means photosynthesis can't take place, many plants close their stomata to reduce water loss. There is one group of mainly desert plants, known as CAM plants, that keep their stomata closed during the day when water loss would be greatest, and open them at night, using a biochemical method to effectively store carbon dioxide in the leaf overnight.
Answer:
a few hours to a few days
Explanation:
Reports that a process can exist do not mention the time involved.
In an industrial process, the length of time likely will be dominated by cleaning, bleaching, and drying times, which could be hours to days. Full-scale production would likely be more efficient if time is shorter. If "appropriate technology" is used, time could run to several days.
