A carbohydrate that forms plant cells walls. C!
Charles Darwin made the observations which led to the theory of evolution.
A barrier/wall can be built around the intended preserved site, this somewhat can stop the wind from eroding the little sediments of the land. Or you can you can use other materials for your site to preserve it, some non sedentary material.
The U.S. central plains region -- nicknamed Tornado Alley -- suffers the highest frequency of tornadoes in the world [source: Tarbuck]. Many of these twisters leave death, injury and destruction in their wake, but one stands in a class by itself.
Sweeping out from southeastern Missouri on March 18, 1925, the Tri-State Tornado careened across the southern tip of Illinois before dissipating in lower Indiana. Remarkably, these three locales lie 219 miles (352 kilometers) apart, and the tornado traveled this distance in just three and a half hours [source: SEMP].
Pyruvic acid supplies energy to living cells through the Kreb’s cycle when oxygen is present. When oxygen is not present, it ferments to produce lactic acid. Basically the pyruvic acid molecule is broken down by enzymes.
