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kompoz [17]
3 years ago
5

Suppose that while the reverse osmosis system is running tank B becomes contaminated with salt water such that it ends up with a

higher salt concentration than tank A. What would happen if the reverse osmosis system was turned off?A) There would be a net flow of water from tank A to tank B.B) There would be a net flow of water from tank B to tank A.C) Water would flow in equal amounts in both directions.
Biology
1 answer:
harkovskaia [24]3 years ago
6 0

Answer:

The correct answer is: A) There would be a net flow of water from tank A to tank B.

Explanation:

  • Osmosis can be defined as the process by which molecules of a substance (water) tend to move from a region where its concentration is high to a region where is concentration is low across a semi-permeable membrane.
  • The force which causes this movement is called the Osmotic Pressure.
  • Reverse Osmosis can be defined as the process by which molecules of a substance (water) move from a region where its concentration is low to a region where its concentration is high, due to the application of a hydrostatic pressure which is more than the osmotic pressure.
  • In the given example, water is is being separated from the salt dissolved in it by the process of Reverse Osmosis.
  • This results in the accumulation of salt in Tank B and accumulation of pure water in Tank A. Reverse osmosis promotes the movement of water from Tank B (where the water concentration is low but salt concentration is high) to Tank A (where the water concentration is high but salt concentration is low) due to the hydrostatic pressure.
  • Stopping Reverse Osmosis will cause normal Osmosis to occur.
  • Hence, the water will move from tank A (where its concentration is high) to tank B (where its concentration is low) until water concentration in both the tanks become equal.

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In a hypothetical population of 2500 people, 2275 people have brown eyes and 225 people have blue eyes (the homozygous-recessive
aev [14]

Answer:

In the next generation of 4000 children, 1680 of them will be heterozygous for the eye colour.

Explanation:

There's a population of 2500, 2275 of with have brown eyes and 225 blue eyes. <u>Let's call the dominant allele associated with brown colour "B" and the recessive allele associated with blue colour "b"</u>. So the possible genotypes are BB, Bb and bb, being BB and Bb brown eyed individuals and bb blue eyed individuals.

If the population it's in Hardy-Weinberg equilibrium, it means genotypic and allelic frequencies don't change from one generation to the following.

From the information given, we can calculate both allelic and genotypic frequencies.

First, we know that the frequency of the genotype bb it's the amount of blue eyed individuals over the total population.

  • f(bb)=225/2500=0.09

Additionally we know the allelic frequencies can be related to the genotypic ones when the population it's in Hardy-Weinberg equilibrium. Particularly we can say:

  • f(bb)=[f(b)]^2 => f(b)=[f(bb)]^(1/2)= 0.3 <em>(square root of f(bb)).</em>

Also, we can calculate the frequency of the B allele, as the probability of all alleles of the gene sum 1. In other words:

f(b)+f(B)=1 => f(B)=1 - f(b) = 1 - 0.3 = 0.7

So far, we have calculated the allelic frequencies, f(b)=0.3 and f(B)=0.7.

Now we can calculate the genotypic frequencies, using the equations of the Hardy-Weinberg equilibrium.

  • f(bb)=[f(b)]^2 => f(bb)=0.3^2=0.09
  • f(Bb)=2*f(B)*f(b) => f(Bb)=2*0.7*03=0.42
  • f(BB)=[f(B)]^2 => f(BB)=0.7^2=0.49

Finally, knowing that there are 4000 children in the next generation, to know how many of them are expected to be heterozygous for the eye colour, we should multiply the number of children for the probability of being heterozygous for the eye colour (which is the genotypic frequency for the genotype Bb).

  • Nº of heterozygous individuals = f(Bb)*total population= 0.42*4000
  • => Nº of heterozygous individuals =1680

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3 0
3 years ago
The four nucleotides found in human DNA (G, A, T, C) combine in groups of three to create potentially 64 different amino acids,
Liula [17]

Question 1

Answer:

D- Different nucleotide combinations code for the same amino acid.

Explanation:

Some amino acid has more than one nucleotide combination coding for it.

Question 2

Answer:

B- Redundancy

Explanation:

Redundancy means that more than one codon is assigned for the coding of most amino acids.

Question 3

Answer:

0%

Explanation:

Since both parents are homozygous dominant and recessive respectively, no crossing can give the homozygous dominant as all offspring are heterozygous.                  

Question 4

Answer:

Homozygous.

Explanation:

The genotype 'dd' is homozygous since the two letters are both in the lower case.

Question 5

Answer:

25%                

Question 6

Answer:

Dihybrid cross

3 0
3 years ago
Identify resources from living things and name the sources of these resources
tester [92]
<span>Many resources come from living things. We use animals such as chickens, cows and pigs for meat. We use plants for numerous things. Plants are eaten and also we can make products from them. An example is cotton. We make clothes from that item.</span>
8 0
3 years ago
1. Living things are organized. Explain what this means including the terms cells, tissues, biosphere, atoms, and ecosystems.
Ad libitum [116K]
The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.
6 0
3 years ago
What terrestial planet is the largest
Firdavs [7]

Answer:

Earth is the largest terrestial planet.

Explanation:

8 0
3 years ago
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