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timofeeve [1]
2 years ago
5

Stellar evolution is the life cycle of a star. A cycle suggests that upon death of a star, another star is born. How is this pos

sible?
Biology
1 answer:
ANTONII [103]2 years ago
5 0
This is possible because when a star dies, it basically expands to its maximum (explodes). Therefore, the materials of the exploded star mix with the primeval hydrogen of the Universe. Later, other stars are formed out of this mixture. Thats also how the sun was formed. :)
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In this lesson we learned how the biosphere, lithosphere, hydrosphere and atmosphere interact. Which statement below is correct?
vovikov84 [41]
The answer is C i took the same test and passed it 
4 0
2 years ago
Bacterial cultures are sometimes exposed to ultraviolet (UV) light in order to generate organisms with new genetic traits. Why d
const2013 [10]
<h2>Ultraviolet (UV) Light</h2>

Explanation:

  • <em>Ultraviolet germicidal irradiation (UVGI)</em> is a purification technique that  inactivate microorganisms and the short wavelength ultraviolet (UV-C) light to execute by destroying nucleic acids and upsetting their DNA, leaving them incapable to vital cellular functions.
  • <em>Ultraviolet (UV) light kills cells damaging their DNA</em>
  • <em>The subsequent thymine dimer is very stable,</em> however fix of this sort of DNA harm for the most part by extracting or expelling the two bases and filling in the holes with new nucleotides is fairly efficient.
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7 0
3 years ago
which statement correctly compares and contrast the three stages of cellluar respiration that occurs in the presence of oxygen
Lapatulllka [165]
<h2><u>Full Question:</u></h2>

Which statement correctly compares and contrasts the three stages of cellular respiration that occur in the presence of oxygen? Each stage occurs in the mitochondria, but only the final stage produces ATP. Each stage produces ATP, but only the third stage occurs in the mitochondria. Each stage produces ATP, but only the first stage occurs in the cytoplasm. Each stage occurs in the cytoplasm, but only the final stage produces ATP.

<h2><u>Answer</u>:</h2>

Each stage produces ATP, but only the first stage occurs in the cytoplasm.

<h3><u>Explanation</u>:</h3>

Cellular respiration is the process by which the glucose or any respiratory substrate is burned down inside a cell producing ATP or energy. This process of cellular respiration is seen in each and every living cell. The glucose is burned in the cytoplasm of the cell producing the pyruvate. This pyruvate is decarboxylated into Acetyl CoA and transferred inside the mitochondria. So the glycolysis or the 1st step of cellular respiration occurs in cytoplasm and rest inside the mitochondria.

ATP is produced from each astep of cellular respiration. So the correct option is option C.

4 0
2 years ago
Sometimes we call "clean energy"<br> *<br> A) Fossil fuels B) Petroleum C) green energy
m_a_m_a [10]
Answer:
C) Green energy
7 0
3 years ago
Air masses move from areas with high pressure (such as the poles of the Earth) to areas with low pressure (the equator). The tem
valina [46]

Answer:

B

Explanation:

Warm because land gains heat faster than water when heated by the sun. The heated land then transfers the heat to the atmosphere. The air mass is dry becasue a continent is mainly land and very little water (unlike oceans). There is, therefore, very little moisture in the continental tropical air mass.

5 0
3 years ago
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