What is radioactive dating?
A. A method of determining the age of a fosall based on the amount
of certain isotopes that remain in a fossil or rock
B. A method of determining the age of a fossil that estimates the age
of the organism at its death
C. A method of determining the age of a fossil based on a
comparison to the age of other similar fossil
D. A method of determining the age of a fossil that estimates how
closely related various fossilized organisms were

Answer:

The expectations of the bands will be more on the gels.

Explanation:

One sample provides several sizes and thickness bands in the gel electrophoresis according to the size of fragments that run in it. An individual would expect more bands due to the increase in the number of samples which is 20 samples now.

An increase in the number of samples produces more bands. So one can easily expect more bands from the 20 samples. Scientists would get more bands on the gels.

Thus, the expectations of the bands will be more on the gels.

If the scientist collects 20 dung samples ; we should expect more band on the gel

Given that each dung sample has varying sizes and varying thickness of bands in the gel electrophoresis which depends on the size of fragments contained in it. Therefore when a number of dung samples ( 20 ) are collected  it is only logical that the number of bands on the gel will increase ( i.e. you should expect more band on the gel ).

Hence we can conclude that If the scientist collects 20 dung samples we should expect more band on the gel .

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Although your question lacks some data a general answer within the scope of your question is provided

Answer:

The cyanide resistant respiration differs in plants as oxi­dation of reduced coenzyme continues even in the presence of cyanides.

Explanation:

Complete question:

Part C: Using the Punnett square to make predictions

Use the completed Punnett square in Part B to answer the questions below about the F2 generation.

Note: You will find the Punnet square in the attached files.  

Note that questions 3 and 4 require a more advanced evaluation of probabilities than do questions 1 and 2 because you have to consider all possible groupings and orders of three F2 seeds. If you need help with these calculations, use Hint 3.

1) What is the probability that an F2 seed chosen at random will be yellow?

2)  What is the probability that an F2 seed chosen at random from along the yellow seeds will breed true when selfed?

3) What is the probability that three F2 seeds chosen at random will include at least one yellow seed?

4) What is the probability that three F2 seeds chosen at random will include one green seed and two yellow seeds?  

Answer:

1) 3/4              

2) 1/3

3) 63/64

4) 27/64

Explanation:

Parental) Yy   x   Yy

Gametes) Y   y   Y   y

Punnet Square)

                      (1/2) Y            (1/2) y

      (1/2) Y    (1/4) YY         (1/4) Yy

      (1/2) y     (1/4) yY          (1/4) yy  

F2)  1/4 YY

      2/4 = 1/2 Yy

      1/4 yy

1) There will be 3/4 of probabilities of getting a yellow F2 seed

   1/4 YY + 2/4 Yy = 3/4 Y-

   The symbol "-" means that in its position there might be either a Y or y allele.

2) As there are only three yellow possible genotypes for yellow seeds, the fourth genotype for green seeds is not considered. Our pool now is only yellow seeds. So the probability of getting a pure breeding yellow seed among all yellow seeds is 1/3.  

   1/3 YY

   1/3 Yy

   1/3 yY

In the pool of yellow seeds, there are three genotypes, and only one of them corresponds to pure breeding yellow seed.

3) To calculate the probability of getting at least one yellow seed among the three seeds randomly chosen, we need to multiply and then perform addition. This is, when we take three seeds from the pool, we have different possibilities of getting seeds with different genotypes. So:

There might also be one green sees and two yellow seed, so we multiply their probabilities in the order in which we might get them. This is:

And we could also get two green seeds and only one yellow seed:

Now, having all the possibilities, we just need to add all the possibilities:

27/64 + 9/64 + 9/64 + 9/64 + 3/64 + 3/64 + 3/64= 63/64.

Note that we did not include the possibility of getting three green seeds (1/4 x 1/4 x 1/4). This is because we were asked to calculate the probabilities of getting AT LEAST one yellow seed.

4) To calculate the probability of getting two yellow seeds and one green seed among the three seeds randomly chosen, we should multiply probabilities and then sum them up.

The orders in which we could get the seeds are:

Now, having all the possibilities, we just need to add all the possibilities:

6/64 + 9/64 + 9/64 = 27/64.

Answer:

1) 3/4

2) 1/3

3) 63/64

4) 27/64

Explanation:

1) yellow seed could either be GG, Gg or Gg from Punnett square, therefore, there is a 3/4 probability

2) true-breeding = either GG or gg. Therefore, out of the 3 yellow seed options, only 1 is true-breeding, therefore, it's a 1/3 probability

3) "there are 7 possible groupings that have at least 1 yellow seed; the sum of their individual probabilities yields the final answer of 63/64. Note that you could have also calculated this answer by subtracting the probability of the one category that doesn’t fit the criterion (Green, Green, Green) from the total probability (1 – 1/64 = 63/64)"

4) "there are 3 possible groupings that have 1 green and 2 yellow seeds; the sum of their individual probabilities yields the final answer of 27/64"

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Answer:

mass of CaCl₂ = 67.4 g of CaCl₂

Explanation:

A 45% CaCl₂ Solution contains 45 g of solute per 100 mL of solution.

mass concentration = mass of solute (g)/ volume of solution (L)

100 mL of solution = 100 * 1L /1000 = 0.1 L

Mass concentration of solution = 45 g/0.1 L = 450 g/L

Molar concentration of solution = mass concentration / molar mass

molar mass of CaCl₂  = 111 g/mol

molar concentration = 450 g/L / 111 g/mol = 4. 05 mol/L

Number of moles of CaCl₂ present in 150 ml of 4.05 mol/L  solution = molar concentration *  volume (L)

number of moles of CaCl₂  = 4.05 * 150 * 1 L/1000 = 0.6075 moles

mass of CaCl₂  present in 0.6075 moles  = number of moles * molar mass

mass of CaCl₂ = 0.6075 * 111 = 67.4 g of CaCl₂

Answer:

b. It is based on the size of seismic waves

Explanation:

just did the test

The statement that describes one aspect of an earthquake's magnitude is: "It is based on the size of seismic waves."

An earthquake's magnitude is a measure of the amount of energy released by the earthquake, and it is determined by measuring the amplitude (height) of the seismic waves generated by the earthquake. The size of the seismic waves is directly related to the amount of energy released by the earthquake, and this is used to calculate the earthquake's magnitude.

The most commonly used scale for measuring earthquake magnitude is the Richter scale, which is based on the amplitude of the largest seismic wave recorded on a seismogram. Other scales, such as the moment magnitude scale, are based on the seismic moment, which takes into account the size of the fault rupture and the amount of slip on the fault.

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