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elena-14-01-66 [18.8K]
3 years ago
7

Explain why fossil evidence is consisten with the scientific theory of evolution.

Biology
1 answer:
-BARSIC- [3]3 years ago
5 0

Answer:

This supports Darwin's theory of evolution, which states that simple life forms gradually evolved into more complex ones. Evidence for early forms of life comes from fossils. By studying fossils, scientists can learn how much (or how little) organisms have changed as life developed on Earth.

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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
Capsular hydrostatic pressure is the chief force pushing water and solutes out of the blood and across the filtration membrane.
frozen [14]

Answer:

False

Explanation:

Capsular hydrostatic pressure is not the main force that pushes water and solutes out of the blood and through the filtration membrane.  On the contrary, this pressure acts against the filtration membrane, making it difficult for water and solutes to escape from the blood.

Increasing this pressure decreases the infiltration rate and causes obstruction of the urinary tract that tends to accumulate urine, causing a lot of pain to the patient with  Renal Failure.

3 0
3 years ago
Dr. Bartholomew believes people who are very hostile have become so because of their environment. Dr. Tiburon believes people's
bagirrra123 [75]

Answer:

Nature and Nurture

Explanation:

Dr Bartholomew believes that behaviour  is because of nurture, meaning that it is based on where you are raised or who raised you.

Dr. Tiburon on te other hand believe that behaiour is something that you inherit from birth and therefore believes in nature.

7 0
3 years ago
Read 2 more answers
Novobiocin is a bacteriostatic, narrow-spectrum antibiotic that targets _____ in some Gram-positive bacteria.
Morgarella [4.7K]

Answer:

Novobiocin target DNA GYRASE of gram positive bacteria.

Explanation:

Novobiocin is a bacteriostatic(slow down bacteria growth) or bactericidal i.e it kills bacteria , narrow spectrum antibiotics that target DNA GYRASE of gram positive bacteria. It acts by inhibiting the bacteria DNA gyrase hydrolysis thereby by interfering with the metabolic activities of bacteria. It is also a weak catalytic inhibitor of mammalian. Novobiocin inhibit DNA gyrase and topoIV by binding to the ATP pocket of GyrB and ParE, respectively.The Streptomyces strain that produces Novobiocin and it is more effective on gram positive bacteria that gram negative bacteria because gram negative bacteria are resistant to it.

8 0
3 years ago
Electrons, protons, and neutrons are three subatomic particles of an atom. If the atom undergoes a change and becomes a positive
lora16 [44]

Answer:

electron

Explanation:

When a neutral atom lose an electron, it becomes a positively charged ion. That means the atom change when the electron is lost or gained. Hence, if the atom undergoes a change and becomes a positive ion, in this process the lost subatomic particle is electron.

7 0
3 years ago
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