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Lady_Fox [76]
3 years ago
13

Which events contributed to life evolving on earth

Biology
2 answers:
strojnjashka [21]3 years ago
8 0

Answer:

I believe through 'Natural Selection'. This occurs through the following steps

1) Genetic Variation

2) Over-Production

3) Struggle for existence

4) Survival of the fittest

5) Advantageous characteristics passed on to offspring

Hope this answered your question.

dexar [7]3 years ago
6 0
<h3><u>Evolution of life:</u></h3>

The given below are the events that are involved in the evolution of life which includes climate variation, geographical events, major extinction, and changes in the position of the continents.

  • 4.6 billion years before, the earth is formed after bombardment with comets.
  • 3.8 billion years before, the formation of replicating molecules occurred.
  • 3.5 billion years before, the unicellular organisms formed and the photosynthesis started to occur.
  • 555 million years before, many marine living animals started to dwell.
  • 500 million years before, the vertebrate started to evolve from the invertebrates.
  • 450 million years before, the marine lives started to move to lands which are arthropods.
  • 420 million years before, the earth landscape started to change.
  • 360 million years before, the forest started to appear and four limbed animals started to dwell.
  • 248 million years before, the earth's largest extinction took place where 90% of marine lives and 70% of lives living in land has went extinct.
  • 225 million years before, the mammals and dinosaurs started to dwell.
  • 65 million years before, the dinosaurs went extinct; and bird and mammals survived.
  • 4 million years before, many mammals went extinct and ice age began.
  • 130,000 years before, cave man started to live and the initiation of modern human took place.
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Light penetrates the clear water of the open ocean more deeply than it does lake
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7. In the pocket mice investigation, what patterns in the data did you observe? Does the pattern in the
Korvikt [17]

Dark fur color appears to be an adaptation for mice living in dark environments, as both the frequency of the characteristic and the allele that generates it have altered. These findings further back with the theory that selection is context-dependent, as dark mice were preferred in some contexts but not in others.

<h3>What is mutation?</h3>

A mutation is defined as a change in the sequence of genetic letters, called bases, within a molecule of DNA.

In a population, more offspring are born than can survive, resulting in competition among people. Individuals that possess a certain trait are more likely to live and/or produce more offspring than those who do not possess that trait. The context in which a species exists influences its selection. Characteristics that are advantageous in one setting may be detrimental in another.

New mutations cause black color.

  1. Fur color is controlled by many genes (4:29).
  2. Most genes are identical, but dark and light rock
  3. pocket mice differ in one gene (Mc1r; 4:55).

For more information regarding mutations, visit:

brainly.com/question/17031191

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Which is the best explanation for why there is a continued need to develop new antibiotics to fight bacterial infections?
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Today, drug-resistant infections are a serious threat to people's health. Hundreds of thousands of lives are lost every year because of infections that can no longer be treated with existing drugs. Discovering new antibiotics, able to kill drug-resistant bacteria, is essential to saving modern medicine.

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To treat the discharge of untreated waste from a type i or type ii marine sanitation device the following steps should be taken into account;

The “Y” valve must be secured to prevent accidental illegal discharge. This can be done by placing a lock or non-reusable seal on the “Y” valve or by taking the handle off the “Y” valve. Only treated sewage from an approved MSD may be discharged directly overboard.


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