The correct solution for this is explained the first option. Since water has an equivalent amount or number of H ions and OH ions, pure water itself is not slightly acidic nor basic. This equality of ions, causes the pH of water to be around the mid point of the pH scale which goes from 0 - 14, and thus is 7. This is a neutral pH.
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In the short term, what we would call “ecological time scales”, competition shapes communities primarily by limiting population growth. Every population requires and excess of required resources to grow larger, but if another population is taking those resources instead, then their growth is limited. If your competitor is significantly better at securing resources, and is growing larger, your population may find that it is actually too large for the amount of resources it is capable of obtaining, and so will have to shrink down to a level that can be sustained by the amount of resources it can get.
Competition with individuals of your own species also limits the size of your population, even more so than competition with other species. This is because members of the same species have more overlapping sets of resources that they require. Two humans both need houses and water, so they compete for them both, but they don’t have to compete with birds for houses, only water.
In the longer term, called “evolutionary time scales”, competition can change the characteristics of the species that are in competition with each other. Species may evolve to need certain resources less if their competitors are better at obtaining them. This allows those two species to evolve to be more compatible, allowing them to better coexist by making them less competitive with one another.
Evolution won’t change a single species to be able to compete less with members of its own species, but in some cases it can lead to the creation of new species.
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A) myoglobin binds the oxygen by means of iron
B)myoglobin would be an effective O_2-transport in other tissues
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A river may be defined as a naturally occurring watercourse that mostly has fresh water, and that eventually deposits its load into oceans, seas or even other rivers. On the other hand, a creek is a small river or a rivulet. Creeks have all the characteristics that rivers possess with a few differences between the two.
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I hope this helps:)
You question is incomplete, because I cannot read the final option - it isn't finished.
However, based on the options I can read, the best <span>sentence for an article about whether or not certain genes play a favorable role in human evolution is the third one - j</span><span>umping genes have the unsavory reputation of causing genetic mutation or cancerous cell growth.
The other two options say nothing about the role of certain genes, they just state some facts. </span>