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spin [16.1K]
3 years ago
8

What factor caused the appearance of oxygen?

Biology
1 answer:
Nookie1986 [14]3 years ago
8 0

Answer:

The appearance of free oxygen in the Earth's atmosphere led to the Great Oxidation Event. This was triggered by cyanobacteria producing oxygen which developed into multicellular forms as early as 2.3 billion years ago

Explanation:

To clarify what I said here are some questions to help!

How did oxygen first appear?

Whiffs in the air is how oxygen first appeared billions of years ago.

For the most part, scientists agree that oxygen, though lacking in the atmosphere, was likely brewing in the oceans as a byproduct of cyanobacterial photosynthesis as early as 3 billion years ago

When was oxygen found?

2.33 billion years ago

Since its first appearance 2.33 billion years ago, oxygen accumulated in high enough concentrations to have a weathering effect on rocks just 10 million years later.

I don't know if this helped you but if it does, please let me know!

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In working with Drosophila it is common to use a balancer stock to maintain mutations of interest. The balancer chromosomes are
spin [16.1K]

The inversion would suppress recombination.

In Drosophila, the mutations which are recessive are lethal or recessive sterile. Balancer chromosomes are used to hold the deleterious mutations in stable shares as well as to save you recombination with the aid of suppressing.

Chromosomal inversions prevent the recuperation of recombinant chromosomes in ways.

  • the crossovers do now not shape within the location of inversion breakpoints, due to the fact synapsis is inhibited.
  • unmarried crossovers' inner inversions result in aneuploid gametes that cannot give upward push to normal progeny.

Drosophila is a genus of flies, belonging to the own family Drosophilidae, whose participants are often referred to as "small fruit flies" or (much less regularly) pomace flies, vinegar flies, or wine flies, a connection with the feature of many species to linger around overripe or rotting fruit.

Learn more about Drosophila here brainly.com/question/14458439

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6 0
1 year ago
True or false? it is the medical assistant's responsibility to determine whether a patient has an advance directive in place
Mila [183]
The statement above is TRUE.
Medical advance refers to the document which a patient write down in advance in other to indicate the type of medical treatment he or she will prefer in case the person become so sick that they can not communicate this need to the health providers again.
The medical assistant in the hospital is the one who act as the patient's coordinator by providing means of communication between the other health providers and the patient. So, it is their duty to ensure that the patient has an advance directive in place.
6 0
3 years ago
When particles may flow freely you have a solid, liquid, or gas ? <br><br> I need the answer please
horrorfan [7]

Answer:

The answer is Gas.

Explanation:

Gas flows freely because the particles are loose and has no restraints.

4 0
3 years ago
Read 2 more answers
Which of these is not true about weight?
Scorpion4ik [409]
The answer for this is B. Gravity has nothing to do with weight
3 0
3 years ago
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DNA has two strands. If the sequence of nucleotides of one strand was known, is it possible to use that information to determine
erica [24]

Answer:

Yes , it is possible to make sequence of another nucleotide.

Explanation:

An adenine on one strand is always paired with a thymine on the other strand, and a guanine is always paired with a cytosine . If the sequence of nucleotides on one strand is known, the sequence of the other strand will be automatically known as well.

I hope this helps you

5 0
4 years ago
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