Answers to Questions Kids Ask! - Where "Why?" Turns to "Wow!"
Cows can eat grass, so why can’t we? Well, plant cells contain something called cellulose. Chemically, it’s almost identical to a lot of the carbohydrate molcules (like glucose and fructose) in the food we eat. But cellulose has one bond that’s different, and we can’t break that bond to get the energy out of the cellulose the way we get it from other molecules. So we could eat grass, but we wouldn’t be able to digest it to get the energy we need. Cows and other mammals can eat grass because they have special bacteria living in their stomachs called symbiont bacteria. These symbionts can break the bond in cellulose for the animal its living in. That way cows can get energy from grass. We don’t have any of these symbiont bacteria, so we can’t digest the cellulose in grass.
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Word of the Daybletting:
bletting: the ripening of fruit until the desired degree of softness is attained.
Born on this dayAugust 31, 2014
1897 - Frederic March
1932 - Roy Castle
1916 - Robert Hanbury Brown
1938 - Martin Bell
1944 - Clive Lloyd
1949 - Richard Gere
1962 - Todd Carty
1970 - Debbie Gibson