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scoray [572]
2 years ago
8

Which term refers to similar structures that related species have inherited from a common ancestor?

Biology
1 answer:
blondinia [14]2 years ago
6 0

Answer:

homologous structures.

Explanation:

If two organisms look very similar during their early stages of development, this is evidence that the organisms. evolved from a common ancestor.

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Which statement is true about the process of accretion?
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The process of accretion is the process of adding material (typically gaseous matter) to a tectonic plate or a landmass as a result of the gravitational forces.Most astronomical objects, such as galaxies, stars, and planets, are formed by the accretion processes<span>.
From the given options the following statement is true about the process of accretion:
A.</span><span>It enlarges continental landmasses and forms mountains along the edges of continents.</span>
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3 years ago
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In a two-compartment model of a cell with a K - and Cl --permeable membrane and a 10-fold excess of KCl in the inside compartmen
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Answer:

When the solutions (including inside and outside) were replaced by NaCl, the membrane potential changes from a negative value of -60 mV to a positive value of + 60 mV.

Explanation:

According to the Nernst equation the potential of the membrane for a two-compartment model of a cell for positive gradient of K⁺ ions is V = - 60 mVlogK'/K where K' = inside concentration of K⁺ ions and K = outside concentration of K⁺ ions. For a 10 fold excess of KCl in the inside compartment, K'/K = 10. So,

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For a negative gradient of Na ions is V = + 60 mVlogK'/K where K' = inside concentration of Na⁺ ions and K = outside concentration of Na⁺ ions. (Since the cell is selectively permeable to Na⁺ ions. So, Na ions to not flow out but in.)For a 10 fold excess of NaCl in the inside compartment, K'/K = 10. So,

V = + 60 mVlogK'/K = + 60 mVlog10 = +60 mV.

So, when the solutions (including inside and outside) were replaced by NaCl, the membrane potential changes from a negative value of -60 mV to a positive value of + 60 mV.

8 0
2 years ago
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Answer:  

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Explanation:

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Why do plants and animal need freshwater?
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