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snow_tiger [21]
3 years ago
10

Explain what the sun is and how it differs from other stars we see in the sky.

Biology
2 answers:
MrMuchimi3 years ago
4 0

hi there

your answer to this response is

The sun is a star. It is different from other stars from the stars that we see in the sky because the sun gives off energy so that there can continue to be living things. The sun is also much closer than the other stars in the sky. The sun is made up of hydrogen gas.

the other stars in the sky are  in different galaxys this  how they are different to  our sun. and our sun is half way in its life and there a lot more years for it to go.

i hope this helps you out

i have a great afternoon

FaithRawlins14

masha68 [24]3 years ago
3 0

Our sun is a hot and shiny ball of hydrogen and helium in the center of our solar system. It is 1,392,000 km in diameter, which makes it 109 times wider than Earth. The surface temperature reaches 5,500 degrees Celsius, and 15,000,000 degrees Celsius in the core.

Turns out our sun is a medium-sized star. There are bigger stars and there are smaller stars. We find stars that are 100 times larger in diameter than our sun. Truly, these stars are huge. We also saw stars only a tenth the size of our sun.

Our sun is a little unusual because it has no friends. It is just a sun surrounded by planets, asterioids, comets and dwarf planets. But solar systems can have more than one sun. In fact, this is often the case. More than half of all stars are in multiple star systems. This means that the solar system has two or more suns in it.

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Leigh's disease is a mitochondrially inherited disease with symptoms that include seizures, fatigue, impaired reflexes, breathin
Ahat [919]

About the question:

You will find the pedigree in the attached files

Answer:

  • individual 4 → Affected woman → Black circle
  • individual 5 → Affected woman or man → Black circle or square
  • individual 7 → Healthy woman → Empty circle
  • individual 10 → Affected boy → Black Square

Explanation:      

Mitochondrial inheritance is the transmission of a disease or a trait from the maternal line.

<em>Most of the DNI is in the nucleus, but there is also DNI in mitochondria. Sperm cells hardly transfer mitochondrial genes to the progeny</em>, so mitochondrial DNI is mostly inherited from the maternal side. If there exists any mutation in this mitochondrial DNI, the whole progeny of the mutated woman will be affected, as they will get the mother genotype carrying the mutation. On the contrary, if an affected man is carrying a mutation in mitochondrial DNI, non of their descendants will get the disease.

Before answering the question, let us remember the pedigree symbols.

  • Squares represent Males/Men
  • Circles represent Females/Women
  • Empty symbols represent healthy/non-affected individuals
  • Solid black symbols represent sick/affected individuals

In the exposed pedigree, we can see that the mother is affected by the disease (individual number 2), so all her children are also affected (individuals 4, 5, and 6) because the <em>disease is mitochondrially inherited</em>.

Individual 3 is a healthy man, so individual 4 must be an affected woman (Black circle). As she is the one affected, then all her children will also be affected. This couple <em>had one boy and two girls</em>. Individuals 8 and 9 are girls (circle), so individual 10 must be the affected boy (black square).  

On the other hand, individual 6 is an affected man (black square), son of individuals 1 and 2. This man couples with a woman, and they have all healthy children. So this woman (individual 7) must be healthy. Even though the man is affected, all their children are not because their mother (7) is not. Remember that sperm cells do not transmit the mitochondrial genes to the progeny.      

And finally, individual number 5 might be either a man or a woman. In any case, this person is also affected by Leigh's disease.  

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The correct option is B.
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