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Marina86 [1]
3 years ago
8

A blue solution turns yellow when it is exposed to a weak acid. A small amount of this blue solution was added to a test tube of

water containing an aquatic snail. The color of the water in the tube changed from blue to yellow after 30 minutes. A possible explanation for this color change is that the
Biology
1 answer:
Natalka [10]3 years ago
7 0

Answer:

A possible explanation for this color change could be the acid present in the  Snail slime has brought the color change.

Explanation:

  • Snails are  Gastropod molluscs.
  • They secrete a mucus like watery slime to adhere to the surface .
  • Snails also use their slime as a defense.
  • Chemical analysis of snail slime suggested that it contains hyaluronic acid and glycolic acid along with other components.
  • Thus we can state that snail slime is acidic in nature.
  • In the given question it is stated that the blue solution turns yellow on adding a weak acid.
  • So when the color of water changed from blue to yellow  after 30 minutes, we can assume that the colour change was caused due to the slime secreted by Aquatic snail that was introduced into the tube.

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Answer:

The species that develop in aquatic environments, need to be able to have an adequate locomotion and according to the hydrostatic pressure in the water, which this pressure has the opposite direction to gravity in terrestrial life.

Explanation:

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Amorphous bodies, with few solid structures, not bony, make them better adapt to movements in water masses that are promoted by hydrostatic forces.

5 0
3 years ago
Which of the following correctly describes contrasting features of a plant cell and an animal cell?
Evgen [1.6K]

C.Plant cells have a large central vacuole that takes up most of the cell's space, and animal cells have many smaller vacuoles.


Hope it helps : )

7 0
3 years ago
Read 2 more answers
small group of 100 people decide to isolate themselves from the world and move to a small and remote deserted island. Out of thi
irina [24]

Answer:

Frequency of p = 0.684

Frequency of p = 0.316

Number of individuals with homozygous dominant (AA) = 47

Number of individuals with heterozygous (Aa)= 43

Number of individuals with homozygous recessive (aa) = 10

Explanation:

Out of 100 people, 10 have albino skin (aa)

So, the frequency of homozygous recessive individuals (q^{2}) is \frac{10}{100} = 0.1

Now, q will be

= \sqrt{q^{2} } = \sqrt{0.1} \\= 0.316

As per Hardy Weinberg's equation -

p + q = 1

Substituting the value of q in above equation, we get -

p + 0.316 = 1p = 1 -0.316\\p = 0.684

Now the frequency of homozygous dominant (AA) will be

p^{2} = 0.684^{2} \\= 0.467

Hence, out of 100 people 0.467 * 100 = 46.7 or 47 people are homozygous dominant (AA)

Like wise out of 100 people 0.1 * 100 = 10 people are homozygous recessive (aa)

As per As per Hardy Weinberg's equation-

p^{2} + q^{2} + 2pq = 1\\

Substituting the values in above equation, we get -

0.467 + 0.316 + 2pq = 1\\2pq = 1 -( 0.467+ 0.1)\\2pq = 0.433

So, out of 100 people 0.433 * 100 = 43.3 or 43 people are heterozygous (Aa)

7 0
3 years ago
In which organism is ddt least concentrated?
MrMuchimi

Answer: I would say D)

Explanation:Phytoplankton are the autotrophic components of the plankton community and a key part of oceans, seas and freshwater basin ecosystems. This is the least ddt and is concentrated.

4 0
3 years ago
Use the diagram below to answer the question that follows.
Katen [24]

Answer:

b. quantitative observation

if its wrong sorry.

hope this helps you ☺️☺️

4 0
2 years ago
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