Burgess Shale has the best record we have of Cambrian animal fossils. The locality reveals the presence of creatures originating from the Cambrian explosion, an evolutionary burst of animal origins dating 545 to 525 million years ago. During this period, life was restricted to the world's oceans.
The Burgess Shale contains the best record of Cambrian animal fossils. The location reveals the presence of creatures originating from the Cambrian explosion, an evolutionary burst of animal origins dating 545 to 525 million years ago. During this period, life was restricted to the world's oceans.
The nitrogen gas must be changed to a form called nitrates, which plants can absorb through their roots. The process of changing nitrogen gas to nitrates is called nitrogen fixation. It is carried out by nitrogen-fixing bacteria. The bacteria live in soil and roots of legumes, such as peas.
At right angles to each
other, it is important to take at least two films (or two views) of the
specified anatomical area since you might see things in one view that
you would not see in the other since two views give two different perspectives
if
<span>Moving them multiple times
could cause severe discomfort or pain if the animal is severely injured in
small animal medicine.</span>
