Active site
A reactant
binds to an enzyme in a region known as the active site during a reaction. The active site is the
most important part of the enzyme because it is where the chemical reaction
happens. It usually contains three to four amino acids and a binding site that
binds the substrate and prepares it for catalysis.
<span>A certain virus infects one in every 200 people. A test used to detect the virus in a person is positive 90% of the time if the person has the virus and 5% of the time if the person does not have the virus. (This 5% result is called a false positive.) Let A be the event "the person is infected" and B be the event "the person tests positive".
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Answer: Option D) The mountain ants could not mate with the valley ants
Explanation:
One distinguishing feature of species is their ability to mate with one another.
For example the mountain ants can mate freely with another, so also the valley ants because each belongs to the same specie.
In constrast, the valley ants cannot mate with the mountain ants due to years of reproductive isolation between them, thus resulting in both being different species ( Sympatric species, living in the same territory, but unable to interbreed)
Answer:
I think it is A. Internet
Explanation: