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Studentka2010 [4]
2 years ago
13

According to the principle of maximum parsimony,

Biology
1 answer:
4vir4ik [10]2 years ago
8 0

Answer:

The correct answer is B. the preferred tree is the one that minimizes the amount of evolutionary change.

Explanation:

The principle of maximum parsimony selects the cladogram or phylogenetic tree that explains the phylogeny that has the minimum number of evolutionary changes. It is based on the principle known as Occam's Razor (Occam’s razor) formulated by William Ockham in the 14th century. This principle refers to a type of reasoning based on a very simple premise: other things being equal, the simplest solution is probably the correct one. This is because the simplest solution requires the least number of assumptions and logical operations. The basic premise in Parsimony is that taxa that share a characteristic (similarity) do so because they inherited that characteristic from a common ancestor, homology.

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A model for a​ company's revenue from selling a software package is ​R(p)equals=−2.52^2400​p, where p is the price in dollars of
dsp73

A model for a​ company's revenue from selling a software package is ​R(p)=-2.5p² + 400​p, where p is the price in dollars of the software. What price will maximize​ revenue? Find the maximum revenue.

Answer: p = $80,  R = $16,000

Step-by-step explanation:

The maximum is the y-value of the Vertex.

Step 1: Use the Axis-Of-Symmetry (AOS) formula to find x:

x=\frac{-b}{2a}

R(p) = -2.5p² + 400

     a= -2.5  b=400

p=\frac{-(400)}{2(-2.5)}

         = \frac{-400}{-5}

        =80

∴ In order to maximize the value, the company will sell the software package for $80

Step 2: Find the maximum by plugging the p-value (above) into the given equation.

R(80) = -2.5(80)² + 400(80)

         = -16,000 + 32,000

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A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
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Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

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The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

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pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

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