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Bogdan [553]
3 years ago
5

WILL GIVE BRIANLIEST

Biology
2 answers:
Paha777 [63]3 years ago
8 0

nevermind.............

SIZIF [17.4K]3 years ago
4 0

Answer:

Light energy is converted to chemical energy during photosynthesis.

Explanation:

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What causes a nebula to collapse?
Contact [7]
Irregularities in the density of the gas causes a net gravitational force that pulls the gas molecules closer together. Some astronomers think that a gravitational or magnetic disturbance causes the nebula to collapse. As the gases collect, they lose potential energy, which results in an increase in temperature. 

<span>As the collapse continues, the temperature increases. The collapsing cloud separates into many smaller clouds, each of which may eventually become a star. The core of the cloud collapses faster than the outer parts, and the cloud begins to rotate faster and faster to conserve angular momentum. When the core reaches a temperature of about 2,000 degrees Kelvin, the molecules of hydrogen gas break apart into hydrogen atoms. Eventually the core reaches a temperature of 10,000 degrees Kelvin, and it begins to look like a star when fusion reactions begin. When it has collapsed to about 30 times the size of our sun, it becomes a protostar. </span>

<span>When the pressure and temperature in the core become great enough to sustain nuclear fusion, the outward pressure acts against the gravitational force. At this stage the core is about the size of our sun. The remaining dust envelope surrounding the star heats up and glows brightly in the infrared part of the spectrum. At this point the visible light from the new star cannot penetrate the envelope. Eventually, radiation pressure from the star blows away the envelope and the new star begins its evolution. The properties and lifetime of the new star depend on the amount of gas that remains trapped. A star like our sun has a lifetime of about 10 billion years and is just middle-aged, with another five billion years or so left.

<em><u>Hope i helped! :D</u></em>
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7 0
4 years ago
A protein called Costal was known to be part of this pathway, but for many years its function was unknown, and it was assumed to
Nana76 [90]

Answer:

A kinesin.

Explanation:

Kinesin is a protein belonging to a class of motor proteins found in eukaryotic cells.

Kinesins move along microtubule (MT) filaments, and are powered by the hydrolysis of adenosine triphosphate (ATP) which means kinesins are ATPases. Active movement of kinesins supports several cellular functions like mitosis, meiosis and transport of cellular cargo, such as in axonal transport.

7 0
3 years ago
Read 2 more answers
Scientists believe there is a link between ambient temperature and damage to a head gasket on a car. they perform a study record
Charra [1.4K]
I think b but im not sure

7 0
4 years ago
Read 2 more answers
The volume of a certain gas is 29.3 liters at STP. What would be the volume of the same gas at 1.39 atmospheres and -23.00C? (R=
Andrew [12]

Answer:

19.32L

Explanation:

Given parameters:

Volume of the gas at STP = 29.3liters;

      Using this information first, let us find the number of moles of the gas.

                  Number of moles = \frac{volume of gas}{22.4}

With the number of moles, we can further solve this problem;

                 Number of moles  = \frac{29.3}{22.4}   = 1.31 moles

More parameters;

Pressure on gas  = 1.39atm

temperature  = -23°C  = -23 + 273  = 250K

Unknown:

Volume of gas  = ?

Solution:

The ideal gas equation is the perfect fix to solve this problem.

It is mathematically expressed as;

              Pv  = nRT

where P is the pressure

           v is the volume

           R is the gas constant

            n is the number of moles

            T is the temperature

     Input the parameters;

             1.39 x V  = 1.31 x 0.082 x 250

                     V  = 19.32L

7 0
3 years ago
Refer to Animation: Base Excision Repair. In the example in the animation, uracil is incorrectly paired with guanine. What is th
REY [17]
<h2>Mutation will occur </h2>

Explanation:

Base excision repair operates for small DNA damage such as deaminated bases

  • DNA glycosylase plays an important role in cleavage of glycosidic bond of abnormal base (does not cleave phosphodiester bond)
  • Uracil is incorrectly paired with guanine then mutation will occur
  • The original GC base pair will change into AT base pair(transition of GC to AT)
  • Transition is a mutation in which one purine(adenine or guanine) is substituted for other or one pyrimidine(cytosine or thymine or uracil) is substituted for other

5 0
3 years ago
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