answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
JulijaS [17]
2 years ago
8

The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when ________.

Biology
1 answer:
Leokris [45]2 years ago
3 0

Answer :There was enough oxygen in the atmosphere to support a major burst of life on Earth

Explanation:

The Great Oxygen Event marks the time, approximately 2.5 billion years ago, when there was enough oxygen in the atmosphere to support a major burst of life on Earth

For the first half of the Earht's history, there was no oxygen in the atmosphere. It was inhabited only by single-celled organisms.Of  those simple life forms, the cyanobacteria may have. evolved a way to take energy from sunlight, and used it to make sugars out of water and carbon dioxide. They used the same chemical process we know as photosynthesis. This released vast quantities of oxygen into the atmosphere and  triggered the evolution of complex life.

You might be interested in
To make new cells, humans undergo a process of cell division called mitosis. Before a cell goes through cell division (mitosis),
sashaice [31]

Before a cell goes through cell division (mitosis), it must grow and make a copy of its DNA which is termed as an Inter-phase.

<u>Explanation:</u>

Some tasks must be carried out by the cells before they undergo division: The cell must grow, it must copy the genetic material (DNA) present in it, and  divide into two daughter cells. These steps carried out by cells are termed as  cell cycle.

Cells that contains a nucleus or Eukaryota cells, there are two major phases called interphase and the mitotic (M) phase. that comprises the cell cycle.

In  inter-phase, growth of the cell and making a copy of its DNA is carried out.

In mitotic (M) phase, the cell separation of the DNA in the cell into two sets and division of its cytoplasm takes place resulting in the formation of two new cells.

5 0
2 years ago
To code for the operating microscope, what verbiage are you looking for in the medical record?
daser333 [38]

Question:

To code for the operating microscope, what verbiage are you looking for in the medical record?

(a)loupes were donned for magnification

(b)microdissection may be necessary

(c)due to the intricate dissection under magnification

(d)the operating microscope was steriley draped and brought into the surgical feild

<u>Answer</u>:

Option D: The operating microscope being sterilely draped and brought into the surgical field.

<u>Explanation:</u>

The loupe present is for the single vision magnifying glass, that can be frequently seen with the gold smith and with the watchmakers. The operating microscope are the binocular microscope through which small intricate parts can be observed during repairing of the watches etc. It is used in the surgery for observing the blood vessels as well as the nerves. This instrument can never be sterilized so after the use, it should be properly wrapped sterilely and kept inside the operation room.

5 0
1 year ago
Jasmine's mother took her to the doctor when she had a sore throat. The doctor determined she had strep throat and prescribed an
nalin [4]

Hey there,

Well, When taking antibiotics,the antibiotics affect the gut bacteria that help us digest food. Like when you eat alot, you have an upset stomach and alot of times you will then have diarrhea.

Hope this helps.

~Jurgen

8 0
1 year ago
Read 2 more answers
Drowsiness, paralysis, numbness, poor coordination, and reduced heart rate are common side effects of __________.
Elina [12.6K]
The conditions listed above are common side effects of DEPRESSANTS. Depressants are drugs which slowed down the central nervous system an the brain. They are usually used to treat anxiety and sleep disorders. Other side effects of depressants include: slurred speech, impaired memory and judgement, lowered inhibition, etc.
6 0
2 years ago
Describe the impact of a waterborne pollutant on an aquatic community. write a 100-word report on how that pollutant affected aq
Rufina [12.5K]
A waterborne pollutant can have different effects on aquatic life depending on the nature of the pollutant. A pollutant at lower levels can have minimal or no effect on aquatic life. However, when the concentrations of the pollutant are high, the population of aquatic organisms can be greatly reduced. There are also times when pollutants at lower concentrations cause significant damage. An organism can consume another organism that has absorbed small amounts of the pollutant. As the consumer takes in more of the contaminated organism, the pollutant is magnified in the body of the consumer resulting in lethal concentrations. This is called biomagnification.
4 0
2 years ago
Other questions:
  • Bahan yang dapat menyekat panas biasanya terdiri atas bahan
    12·1 answer
  • Which is an example of the use of plants in human society? Fossil fuel usage causes the elimination of carbon sinks. Plants make
    5·2 answers
  • 1. Which of the following molecules is broken down in cellular respiration, providing fuel for the cell?
    14·1 answer
  • What commonly ingested substances are absorbed through the stomach wall?
    11·1 answer
  • Which principle of heat exchange is the most important explanation for why birds look larger in colder weather because they fluf
    15·1 answer
  • A 12-year-old boy presents to the ER complaining of right testicular pain. Symptoms began 1 hour ago. He describes the pain as a
    12·1 answer
  • Write all possible codons recognized by each of the given anticodons. An anticodon strand reads 5'–GCG–3'. Fill in the missing b
    8·1 answer
  • In rabbits, short hair is due to a dominant allele, S, and long hair to its recessive allele, s. Black hair is due to a dominant
    11·1 answer
  • The p53 protein is a transcription factor that regulates a cell's progression through the cell cycle after DNA is damaged by ult
    8·1 answer
  • Compare and contrast the contributions of Neel, Pauling, and Ingram to our understanding of the genetic and molecular basis of s
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!