Answer: D. A river separates members of a squirrel population that used to occupy the same geographical area.
Explanation:
Allopathic Speciation occurs when a geographic barrier (river, mountain, or canyon) separates members of a population
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Answer:

Explanation:
As we know that the formula for pH is
![pH = -[log H+]\\](https://tex.z-dn.net/?f=pH%20%3D%20-%5Blog%20H%2B%5D%5C%5C)
It is also given in the question that one pH unit represents the 10 fold change in the concentration of hydrogen ion.
Now for lemon juice whose pH is 2, hydrogen ion concentration is equal to

And for pure water whose pH is
, hydrogen ion concentration is equal to

Thus, the H+ ion concentration in lemon juice is
times greater than the pure water.
Homologous structures are the structures with similar anatomy, embryology, morphology, and genetics but dissimilar functions. Analogous structures are the structures that are similar but anatomical dissimilar doing the same function.
<h3>
What is Cladogram?</h3>
A cladogram is a diagramic representation that shows relationships between species. This relationships is based on observable physical characteristics. As the below diagram representing the cladograph of table.
Species A is most primitive species in fossils records. Fossils are the or traces of remains, preserved remains, of ancient organisms.
For more details regarding Cladogram, visit:
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Pesticides<span> can travel great distances through the </span>environment. When sprayed on crops or in gardens,pesticides<span> can be blown by the wind to other areas. They can also flow with rain water into nearby streams or can seep through the soil into ground water. ... Selective </span>pesticides<span> are toxic only to the target pests.</span>
Your hypothesis is incorrect considering every day has the same length to it.