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natka813 [3]
3 years ago
15

Which statement is true about fossils? A) There are more fossils in warm, wet tropical areas. B) No fossils resemble organisms t

hat are presently alive. C) The oldest fossils are found in layers closest to the surface. D) The complexity of the organisms in fossil beds increases closer to the surface.
Biology
1 answer:
lesantik [10]3 years ago
4 0
Fossils found<span> in lower </span>layers<span> of sedimentary rock are older thanfossils </span>found<span> ... </span>Most organisms<span> don't form </span>fossils<span> because </span>their<span> bodies decompose; Petrified ... </span>There<span> are huge </span>fossil beds<span> where many different </span>fossils<span> can be </span><span>found</span>
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3 years ago
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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
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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

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2 years ago
Which term refers to the movement of water molecules through selectively permeable membrane
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Answer:

That would be the definition of osmosis

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What tectonic evidence does NOT support Alfred Wegener's theory of plate tectonics?
loris [4]

Answer: Portrayal of thermal convection as a mechanism.

if its not right im srry :(

but if it is your welcome :D

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GIBING BRAINLIEST, PLEASE ANSWER FOR 40 PTS, DUE IN 30 MINUTES 4 STEM CLASS!!!
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Sorry kid my middle school day re long gone but ummm... don't do drugs

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