The correct answer is - False.
The trilobites are a marine type of animal that has been one of the most successful animals in the earlier stages of the history of life on this planet. They have existed for roughly 270 million years, from approximately 521 million years ago until 252 million years ago. Their beginnings are traced back in the Early Cambrian period, and they went extinct in the great mass extinction at the end of the Permian period.
So, the trilobites are a very common fossil in the time frame from 521 million years ago until 252 million years ago, but they went extinct than, so they are missing from the fossil records onward from that time, thus we can say that they are not common throughout the entire fossil record.
Answer:
chemical spills can have major environmental impacts. Spilled oil and other chemicals can physically damage marine life with run-off contamination in the water. ... Spilt chemicals can also run-off into soil, causing severe ecological damage and making such areas inhabitable for flora and fauna.
Explanation:
The reason why the Midwestern United States have a very fertile soil, but Canada doesn't, despite both of them being covered by glaciers until relatively recently, and both having the same age of soil, is the climate and vegetation.
Canada is much colder than the Midwest, its winters are longer, and the summers mild, while the Midwest has higher temperatures, prolonged period of drought, and seasonal rainfall.
Because of this, Canada has been covered by coniferous forests. They leave relatively little biomass, and also the climate is making the decomposition of the biomass very slow, thus resulting in relatively poor soil quality.
In the Midwest, the climate is perfect for the development of the grasslands. The grasses grown and die each year. They live a lot of biomass, and the higher temperatures contribute that the biomass decomposes pretty quickly, thus resulting in good quality soil.
