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Blizzard [7]
3 years ago
8

Is it necessary to have a gradient in order for diffusion and osmosis to occur why?

Biology
1 answer:
bagirrra123 [75]3 years ago
5 0
Yes. The gradient determines the direction of movement for particles. Diffusion and osmosis are both examples of passive transport Osmosis is the diffusion of water through semipermeable membranes like the cell membrane

The particles will move from an area of high concentration to an area of low concentration. This direction of movement is described as movement *with* the concentration gradient.

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The cause of a change in an organism environment that affects the activity of an organism
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Answer:

Ecological Niche. The functional role of an organism or a species in the ecosystem, including its relationships with other species. ecology. The study of the distribution, abundance, and interrelationships of organisms and their interactions with the environment. Ecosystem

Explanation:

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What are pseudopodia?
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1. Why is it difficult to evaluate thresholds for toxic pollutants? a. Synergistic effects are difficult to account for. b. Ther
qaws [65]
The options are all related, and the answer is D) All of the Above. 

The synergistic effects of exposure to multiple toxins are more difficult to quantify and study. As a result, there is not sufficient research on how much a system can take when exposed to multiple pollutants. This lack of research also means that we often do not even know what the effect of these interactions between multiple toxins are.

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7 0
3 years ago
A certain buffer is made by mixing a weak acid HA and its conjugate base A–. When HA is present at a concentration of 0.5 mM and
MAVERICK [17]

Answer:The ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

Explanation:

The dissociation constant for formic acid = K_a=1.8\times 10^{-4}

Concentration of HA= 0.5 mM

Concentration of A^-= 0.1 mM

pH = 6.16

First we have to calculate the value of K_a.

Using Henderson Hesselbach equation :

pH=pK_a+\log \frac{[A^-}{[HA]}

Now put all the given values in this expression, we get:

6.16=pK_a+\log (\frac{[0.1]}{0.5})

pK_a=6.86

To calculate the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02.

Using Henderson Hesselbach equation :

7.02=6.86+\log \frac{[A^-]}{[HA]}

7.02=6.86+\log \frac{[A^-]}{[HA]}

\frac{[A^-]}{[HA]}=1.44

\frac{[HA]}{[A^-]}=0.69

Thus the ratio of the concentrations of HA  and A^- when the buffer has a pH of 7.02 is 0.69

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3 years ago
What molecule allows a blade of grass to stand up straight
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<span>monosaccharides for the strength

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