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FrozenT [24]
2 years ago
8

Explain the steps of the life cycle of a star. Beginning with a nebula and ending with old age/death of a star, explain each ste

p in a star’s life cycle.
Biology
1 answer:
Ymorist [56]2 years ago
4 0
First is the Nebula, a cloud of gas and dust in space where stars are born.
Second is a Star, Luminous globe of gas producing its own heat and light through nuclear reactions.
Third is Red Giant, a large bright star with cool surface, it is formed during the later stage of evolution of a star like our sun.
Fourth is the Red Dwarf, which is very cool, faint and small star.
Fifth is White Dwarf, this is a very small and the last stage in the life cycle of a star.
Sixth is the Supernova, the explosive death of a star
Lastly is the Blackhole, where it is believe to form from a massive stars at the end of their times
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Please answer ASAP!
alukav5142 [94]

Part A:

<span>If early conditions of primeval earth had ammonia, methane, hydrogen in its atmosphere, then it is possible that amino acids such as glycine, α-alanine, and β-alanine may have been spontaneously formed from chemical reactions spurred by energy from lightning.</span>

<span>Their hypothesis was that the early conditions of primeval earth favored the spontaneous formation of organic molecules, from inorganic precursors, that may have been the origin of life. This theory is called abiogenesis. </span>

 

Part B:

<span>Miller Urey put methane, ammonia, hydrogen gases in a glass flask and a pool of water at the bottom of the glass flask. The flask was heated moderately to simulate the hot conditions then. Sparks were also occasionally induced in the flask to mimic lighting. The flask was then cooled slowly to simulate cooling of earth over time.After one day, they found the presence of some amino acids (glycine, α-alanine and β-alanine) was discovered in the water in the flask</span>




5 0
3 years ago
B9(A)
Dominik [7]

Answer:

hk khgvchjhjhuvgkhvgjvkjv kjckgjvkhgvjghckhgckugv

Explanation:

6 0
3 years ago
Which of the following situations accurately describes a difference between a food chain and a food web?
hoa [83]

“A carnivore eats both a rabbit and a mouse in a food web” accurately describes a difference between a food chain and a food web.

 

<span>A food chain is a series of events in which one organism eats another and obtains energy. An example could be a forest food-chain. The bear is the top of the food chain. The bear eats a coyote. The coyote ate the rabbit. The rabbit ate the grass. Since the grass can't technically eat anything, it's the bottom of the food chain and the food chain ends. </span>

 

<span>A food web is a diagram showing the various different plants and animals in an ecosystem in relation to each other. It encompasses many consumers of each different level, acknowledging that one predator may eat several different kinds of prey, and that one kind of prey may be eaten by several kinds of predators. There are many food chains within a food web, and one creature is not necessarily at the top of the hierarchy. </span>

 

The correct answer between all the choices given is the second choice or letter B. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.

6 0
3 years ago
What kind of phytoplankton is Noctiluca? Describe its physical features. Where does it live, and what does it eat? What special
Afina-wow [57]
Noctiluca is a dinoflagellate in the Domain Eukaryota, Superphylum Alveolata, Phylum Dinoflagellata, in the class Noctiluciphyceae, and in the order Noctilucales.
8 0
3 years ago
If glucose was no longer available, predict how this would impact activity within the following processes (increase, decrease, r
JulsSmile [24]

If glucose was no longer available, the effect o the processes below will be as follows:

  • Lactic acid fermentation - decreases
  • Pyruvate processing - decreases
  • Citric acid cycle - decreases
  • Electron transport - decreases

<h3>What is the importance of glucose in the body?</h3>

Glucose is a monosaccharide that plays an important role as the main fuel for the cell to produce energy.

Glucose is broken down in the process of glycolysis to produce pyruvate as well as the reducing equivalents, NADH.

Pyruvate , the breakdown product of glucose from glycolysis enters other biochemical, reaction pathways such as:

  • Lactic acid fermentation,
  • Citric acid cycle, and
  • Electron transport

Therefore, a constant supply of glucose is required to keep the above processes continually functioning.

Learn more about about glucose at: brainly.com/question/7224754

#SPJ1

3 0
1 year ago
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