Answer:
Petroleum gas is mainly C3 and C4 based (propane and butane), whilst natural gas is predominantly C1 and C2 (methane and ethane). Petroleum gas is generally produced via the cracking of naphtha, which is one of the components separated during crude oil refining.
Explanation:
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The answer is an Embryonic cell.
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Answer:
atom
Explanation:
Atoms are the basic unit of matter and defining the structure of elements.
Answer:
The correct answer is A) There are more species that have the ability to travel 5 kilometers than can travel 15 kilometers.
Explanation:
The ecologists MacArthur and Wilson took the term island biogeography theory to refer to the predictions about the number of species that could be inhabiting on an island.
Island biogeography theory establishes that the two factors that affect species richness in natural communities on an island are <u>the distance from the mainland and the size of the island. </u>
At the same time, these factors affect inmigration and extinction rates. According to the theory, the inmigration rate depends on the distance between the island and the mainland, of the number of species that keep living on the mainland and not stablishing on the island and the <u><em>probabilities that the species can move from the continent to the island</em></u>. Islands that are closer to the continent have higher possibilities of receiving immigrants than those islands that are located farther from the mainland. This is the effect of distance.
The extinction rate depends on the area of the island, the number of species living on it and the extinction probability of these species. The effect of size is reflected in the relation between island size and species diversity. In smaller islands, the probability of extinction is higher than in bigger islands. Bigger islands can have more species than smaller ones.
In the case of two islands of the same size and different distance to the mainland, both of them will have the same extinction rate, but the one closer to the continent will have a higher immigration rate, and so, a higher amount of species. The S value will be higher on the island closer to the continent.
When the nucleus of a U-235 atom captures a moving neutron it splits in two (fissions) and releases some energy in the form of heat, also two or three additional neutrons are thrown off. If enough of these expelled neutrons cause the nuclei of other U-235 atoms to split, releasing further neutrons, a fission 'chain reaction' can be achieved. When this happens over and over again, many millions of times, a very large amount of heat is produced from a relatively small amount of uranium.
It is this process, in effect "burning" uranium, which occurs in a nuclear reactor. The heat is used to make steam to produce electricity.