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3 years ago

13

The Cell Theory states that A) all living things are made of cells. B) all cells have only one nucleus. C) plants do not have ce

lls. D) only animals have cells.

2 answers:

likoan [24]3 years ago

8 0

All living things have cells

BlackZzzverrR [31]3 years ago

4 0

Answer: A) all living things are made of cells

Explanation: I Took The Pre-Test On USA Test Prep.

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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

2 years ago

How do shale oil and tar sands compare to conventional<br> (regular) oil deposits?

konstantin123 [22]

Answer:

Oil shale is a form of sedimentary rock that contains kerogen, which is released as a petroleum-like liquid when the rock is heated. Tar sands are a combination of clay, sand, water and bitumen, which is a heavy hydrocarbon.

Additional info:

The term oil sands refers to a particular type of nonconventional oil deposit that is found throughout the world. Oil sands, sometimes referred to as tar sands, is a mixture of sand, clay, other minerals, water, and bitumen. The bitumen is a form of crude oil that can be separated out from the mixture.

The primary distinction between crude or conventional oil and shale oil is the way it collects. The oil in shale is typically found in smaller batches. As a result, shale oil often needs to be fractured so that the oil trapped within the shale can be recovered.

3 0

3 years ago

Read 2 more answers

What is an example of selective breeding

Rudiy27

An example of selective breeding is breeding cattle to produce better meat.

3 0

3 years ago

Read 2 more answers

Which of the following is a reason that Venus is not ideal for supporting life?

Kryger [21]

Answer:

Venus is not ideal for supporting life because it has a thick atmosphere which causes extremely high temperatures.

Explanation:

Venus is the second planet near to the sun in solar system.
It is called the twin of Earth because of its almot similar size.
It completes one revolution in 225 days.
It is the hottest planet on in the solar system having temperature near 735 K which is more than mercury, the nearest planet to the sun.
The high temperatures of Venus results from its extremely dense and Carbon dioxide rich atmosphere. The atmosphere is surrounded by thick clouds of sulphuric acid that cause sulphuric acid rains.
It is known as evening star.

5 0

3 years ago

What are three types of barriers that can lead to reproductive isolation

maw [93]

Temporal isolation , behavioral isolation, and geographical isolation I hope I answered your question if not please try searching up or using further sources

4 0

3 years ago