The correct answer is Birth.
The two elements that raise population size are natality—the number of people who are added to a population over time as a result of reproduction—and immigration—the movement of people into a location. Most births are to folks who are young adults or older. Even at replacement fertility levels (when each woman has approximately an average of two children), there will be more births than deaths if the proportion of young adults to older adults is higher where mortality is highest. Immigration and birth rates lead to population growth. The population shrinks as a result of death rates and emigration. A population that has a negative growth rate is one in which there are more deaths and emigrants than births.
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<u><em>NAD+ and H+ are not the same. </em></u>
NAD+ is an electron carrier. Reactions in metabolism oxidize food molecules and transfer those electrons (along with H+) to > NAD+ which is what forms NADH. Now, NADH is the reduced form of NAD+ and NAD+ is the oxidized form of NADH.
H+ on the other hand, is a proton. It is a hydrogen atom that lost it's electrons. So when you see NADH + H+, that means that the reaction removed 2 electrons and 2 H+ from the compound.
<u>Mercurial </u>describes someone whose mood or behavior is changeable and unpredictable, or someone who is clever, lively, and quick. with a <u>mercurial teacher</u> you never know where you stand.
- Depending on how someone with a volatile temperament manages things, a mercurial personality can either be a bad or positive character feature.
- A person who is mercurial is typically thought of as someone who loses control readily and whose moods vary as frequently and abruptly as a Spring day.
- Mercurial is described as unpredictable or fickle. Someone who is mercurial is someone who can snap into anger in the span of a single second. Of or connected to the god Mercury in Roman mythology.
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Negative selection (D) removes the harmful alleles.