_______________ is a food preservation process that exposes food to radiation energy, preventing microbial growth.
Fill in the blank(s) with the appropriate word(s).
Food irradiation
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During the first 5–600 million years on Earth, temperatures ranged from 500–1000°C, atmospheric pressure was 10 times current levels, and the planet was bombarded with meteorites. How would these conditions favor the formation of biological molecules?
A. Many chemical reactions are inhibited by high temperature and pressure. B. High temperature and pressure are the best conditions for enzyme function, needed to support life. C. Oxygen will break down many organic molecules by reduction. D. Oxygen in this high temperature and pressure atmosphere would have been chemically less reactive. E. Water and meteorite dust would have provided the chemical reactions necessary for formation of biological molecules.
How old was the world thought to be when Darwin began his voyage? How old is it thought to be now? What will be an ideal response?
A cell that is 98% water is placed in a solution containing 3% salt. This cell is now _________ compared to its surroundings.
A. isotonic B. hypertonic C. hypotonic D. hydrophilic
What happens to Glycerol
What will be an ideal response?