Answer:
Oxygen
Explanation:
The earth has been divided into three major categories crust, mantle, and core which are further segregated into sub-parts. Since the crust is the outermost layer of the shell, the outer crust of the earth consists of a combination of silicon and oxygen in the majority followed by some percentage of other metals as well. <u>The percentage of Oxygen includes nearly 50% i.e. 46.6% followed by 27.7% of Silicon and the other 25.3 % includes aluminum, iron, sodium, magnesium, etc</u>. Thus, '<u>oxygen</u>' is the correct answer.
FAD's and LAD's would differ if we focused on dinosaurs within a certain region because of migratory patterns. Similarly, focusing on species levels would decrease the available data.
FADs or First appearance datum is a term used by scientists to refer to the first appearance of a species. Like-wise, LAD is used to refer to the last appearance of a species in the record.
If we were to focus on dinosaurs within a certain region, the FAD's and LAD's may be quite different. This is due to the migratory patterns of certain dinosaurs. Perhaps a certain species has a much more distant FAD or LAD in one region than it does in another because that dinosaur may have taken many years to wander to another region of the Earth.
Like-wise, limiting our search to a species level can impact the LAD or FADs. The taxonomy hierarchy is as follows:
- species
- genus
- family
- order
- class
- phylum
increasing in scope, Domain is the level that holds the highest variety of organisms. In contrast, species is the most specific, so limiting our data to a single species level would greatly affect the LADs and FADs because it lowers the number of dinosaur species that we take into account.
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In 1998, Canada's highest court declared that Quebec could not legally secede.
Explanation:
Canada is the second largest country in the world. In order for the vast territory to be easier for governing, Canada is divided into provinces and territories. Such provinces and territories in Canada are:
- Quebec
- Ontario
- Alberta
- Manitoba
- British Columbia
- Saskatchewan etc.
While most of the provinces and territories have nothing against being in the borders of Canada, there is one that opposes it, that being Quebec. Quebec is one of the provinces that contributes the most to the GDP of the country, is one of the most populous, and has an excellent location.
This province doesn't want to be in the borders of Canada though, but instead wants to be independent. The main reasons for that are that the majority of the people of Quebec have different ethnic and cultural background than the rest of the provinces and territories. While the people of Quebec already had several referendums about independence, with the majority of the population voting for it, the Canadian highest court declared any attempts for seceding of Quebec illegal in 1998.
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An example is the president vetoing a law that Congress passes. He can refuse to sign a bill.
