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3 years ago

13

You’re conducting a science experiment crossing two different purebred mouse strains, which each contain a a different variation

of the same gene, for two generation. What do you expect to see as the phenotype of the first generation? The second generation?

1 answer:

Advocard [28]3 years ago

7 0

It’s is the first generation

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assume that life on Mars requires cell potential to be 100mV, and the extracellular concentrations of the three major species ar

svetlana [45]

Answer:

Explanation:

From the information given:

The cell potential on mars E = + 100 mV

By using Goldman's equation:

$E_m = \dfrac{RT}{zF}In \Big (\dfrac{P_K[K^+]_{out}+P_{Na}[Na^+]_{out}+P_{Cl}[Cl^-]_{out} }{P_K[K^+]_{in}+P_{Na}[Na^+]_{in}+ P_{Cl}[Cl^-]_{in}} \Big )$

Let's take a look at the impermeable cell with respect to two species;

and the two species be Na⁺ and Cl⁻

$E_m = \dfrac{RT}{zF} In \dfrac{[K^+]_{out}}{[K^+]_{in}}$

where;

z = ionic charge on the species = + 1

F = faraday constant

∴

$100 \times 10^{-3} = \Big (\dfrac{8.314 \times 298}{1\times 96485} \Big) \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)$

$100 \times 10^{-3} = 0.0257 \Big ( \dfrac{4}{[K^+]_{in}} \Big)$

$3.981= \mathtt{In} \Big ( \dfrac{4}{[K^+]_{in}} \Big)$

$exp ( 3.981) = \dfrac{4}{[K^+]_{in}} \\ \\ 53.57 = \dfrac{4}{[K^+]_{in}}$

$[K^+]_{in} = \dfrac{4}{53.57}$

$[K^+]_{in} = 0.0476$

For [Cl⁻]:

$100 \times 10^{-3} = -0.0257 \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)$

$-3.981 = \ \mathtt{In} \Big ( \dfrac{120}{[Cl^-]_{in}} \Big)$

$0.01867 = \dfrac{120}{[Cl^-]_{in}}$

$[Cl^-]_{in} = \dfrac{120}{0.01867}$

$[Cl^-]_{in} =6427.4$

For [Na⁺]:

$100 \times 10^{-3} = 0.0257 \Big ( \dfrac{145}{[Na^+]_{in}} \Big)$

$53.57= \Big ( \dfrac{145}{[Na^+]_{in}} \Big)$

$[Na^+]_{in}= 2.70$

6 0

3 years ago

A student wants to view a cell’s mitochondria. Which of the following microscopes would show a mitochondria’s internal structure

Olegator [25]

Answer:

Transmission Electron Microscope would show a mitochondria’s internal structure in the greatest detail

Explanation:

The TEM is used to visualise the internal structure of the cells. This works when an electron beam of light passes through the object or the sample, it shows a clear presence of the organelles inside the cell. The TEM uses the energetic electron which provides the morphological as well as compositional and crystallographic features of the cell. Its maximum potential is about 1 nanometre. Among the most powerful microscope for studying the internal organelles of the cell TEM is one.

5 0

3 years ago

Which layer of the sun is only seen during a total solar eclispe?

Anton [14]

the <em>sun's corona</em> is only visable when there is a solar eclipse

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3 years ago

Read 2 more answers

write two paragraphs in your own words that compare and contrast how you (humans) communicate with sound and how dolphins and ot

Darya [45]

Whales use their lower jawbone to the middle ear. whereby they can ear clearly while they are in the water. Human ears and dolphins ears they work the same . They receive sound directly from the air.

In similar way dolphins and human ears are placed in basic anatomical location which is same as on the head. Without a medium hearing is not possible.

The medium sound for human is air. Sound travels 343 meters per second in air and 147 meters per second in water. The most effective way of transmitting sound waves is through water.

We can say that the sound will be fast to travel in medium if the molecules are closer.

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4 years ago

When a divergent boundary occurs under the ocean it is called

lys-0071 [83]

<span>When a divergent boundary occurs under the ocean it is called oceanic ridge.</span>

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3 years ago