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Pani-rosa [81]
2 years ago
6

one of the tallest dog breeds is the great dane which stands over a meter tall. one of the shortest is the pomeranian which stan

ds about 20 centimeters tall based on what you learned about artificial seletion how were these two breeds developed
Chemistry
2 answers:
Gemiola [76]2 years ago
8 0
We know that domestic dogs are descended from wolves. Exactly when and how this occurred is still being studied; many experts indicate that dogs were first domesticated about 12,000 years ago, but a few DNA studies indicate a much earlier date for the split between the wolf and the dog, perhaps as long ago as 130,000 years. Regardless of the exact timing of the divergence between wolves and dogs, one thing is true: both species display quite a bit of genetic diversity, particularly in size and coloration.In order to breed a dog of a specific size, all one has to do is choose parents with the appropriate variations. For instance, if you want to create a small dog breed, you would just breed the smallest dogs you have, then you would choose their smallest offspring to breed the next generation, and so on until you have reached the desired size.
seraphim [82]2 years ago
8 0
They just bred differently....that's about all<span />
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QUESTION 6 Consider the following reaction between the diatomic and monatomic forms of iodine: I2 (g) &lt;-&gt; 2I (g) When 0.09
aalyn [17]

Answer: The equilibrium constant is 3.3\times 10^{-4}

Explanation:

Initial concentration of I_2 = 0.095 M  

The given balanced equilibrium reaction is,

                            I_2(g)\rightleftharpoons 2I(g)

Initial conc.          0.095 M       0 M

At eqm. conc.     (0.095-x) M   (2x) M

Given : 2x = 0.0055

x = 0.00275

The expression for equilibrium constant for this reaction will be,

K_c=\frac{[l]^2}{[I_2]}  

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

K_c=\frac{(0.0055)^2}{(0.095-0.00275)}

K_c=\frac{(0.0055)^2}{0.09225}=0.00033

Thus the equilibrium constant is 3.3\times 10^{-4}

3 0
2 years ago
Please answer FAST i will make you barinlest
tangare [24]

Answer: A it goes hot to cold not cold to hot.

Explanation:

3 0
3 years ago
Read 2 more answers
A sample of 14.5 g of sodium bicarbonate (NaHCO3) was dissolved in 100 ml of water in a coffee-cup calorimeter with no lid by th
Ann [662]

Answer:

The ΔH of the reaction is + 12.45 KJ/mol

Explanation:

Mass of water= 100ml = 100g. (You should always assume 1cm3 of water as 1g)

heat capacity of water = 4.18 Jk-1 Mol-1

Change in temperature = (19.86 - 25.00) = -5.14 K (This is an endothermic reaction because of the fall in temperature)

Molar mass of NaHCO3 = 84 g/mol

Mole of NaHCO3 = 14.5 / 84 = 0.173 mol

Step 1 : Calculate the heat energy (Q) lost by the water.

            Q = M x C x ΔT

            Q = -100 x 4.18 x (-5.14)

            Q = 2148.5 joules

            Q = 2.1485 K J

Step 2: Calculating the ΔH of the reaction?

          ΔH = Q / number of moles of NaHCO3

          ΔH = 2.1485 / 0.173

          ΔH = 12.42 KJ/mol

3 0
2 years ago
What is a sign that a chemical change has occurred?
blondinia [14]

Answer:

The production of heat, light, or smoke is observed.

3 0
2 years ago
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What would the carbon dioxide part of a soft drink be classified as?
garik1379 [7]

Answer is: A. solute .

Solvation is the interaction of solvent (in this example water) with molecules or ions (in this example carbon dioxide)) in a solute.  

Solvent (usually a liquid, but can also be a solid or a gas) is a substance that dissolves a solute (dissolved in the solvent).

Solvent is always the same state of matter as the solution. In this example, soft drink is a liquid, so water is a solvent.

5 0
2 years ago
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