1answer.
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
Leto [7]
3 years ago
15

Earth's early atmosphere was primarily composed of

Biology
1 answer:
Paul [167]3 years ago
5 0

Answer:

The correct answer is ''carbon dioxide, water vapor and nitrogen.''

Explanation:

About 4.5 billion years ago, Earth was a very geologically active planet. So many volcanic fumes formed the primitive atmosphere, which was mostly made up of water vapor, carbon dioxide, sulfur, and nitrogen. At this point, oxygen was barely present and the oceans did not yet exist. The primitive atmosphere is the one before the Precambrian, it was reductive, that is, it lacked free oxygen, and only had ammonia, methane and hydrogen, the high temperature of the atmosphere in its early stages facilitated the reaction of these gases to form organic compounds from which life may have emerged. UV rays passed, because ozone did not exist.

You might be interested in
comparative profile for covid-19 cases from china and north america: clinical symptoms, comorbidities and disease biomarkers
Hatshy [7]

Different people are affected by COVID-19 in various ways. The symptoms experienced by infected individuals have ranged widely, from little discomfort to serious sickness.

  • The susceptibility to and prognosis of severe acute respiratory syndrome caused by coronavirus 2 or coronavirus disease 2019 (COVID-19) have been found to vary greatly amongst individuals and populations.
  • Intervention in public health must take into account these variations and how they affect susceptibility to infection and the severity of disease.
  • The distinctions between the COVID-19 case profiles from China and North America may be due to regional variations in host, environmental, and healthcare-related factors.
  • These inter-population variances, together with intra-population variability, highlight the need to identify how health inequities and inequalities affect the public health response to COVID-19 and can help with preparing for the epidemic's resurgence.

Learn more about the COVID-19 with the help of the given link:

brainly.com/question/28391554

#SPJ4

6 0
2 years ago
What is photosynthesis
almond37 [142]

Answer:

Photosynthesis is the process, in which the chloroplast in plant cells convert sunlight to energy for the plant

3 0
3 years ago
Read 2 more answers
What will happen if our kidney stops working?
lord [1]

Your hands or feet may swell. You will feel tired and weak because your body needs clean blood to function properly. Untreated uremia may lead to seizures or coma and will ultimately result in death. If your kidneys stop working completely, you will need to undergo dialysis or kidney transplantation.

7 0
3 years ago
How does histone acetylation prepare DNA for transcription?Histones and DNA have opposite charges.Acetylation of histones cancel
Vaselesa [24]

Answer: Histones and DNA have opposite charges -True

Acetylation of histones cancels their positive charge- True

Acetylated histones are more attracted to DNA - False

Acetylation creates binding sites for remodeling engines and other factors- True

Explanation:

It is widely found that acetylation of lysines leads to transcriptional activation. The modifications of histones such as acetylation affect the affinity of the histone for  interacting proteins that control the transcriptional activity of chromatin, which has led to the concept of a histone code.The positive charge on the histones is removed by acetylation, hence they decrease the interaction of histones with the negatively charged phosphate groups of DNA. As a result, the highly condensed chromatin is now transformed to a more relaxed structure and thereby higher level of transcription are achieved

7 0
3 years ago
When these animals made the prints, was the soil moist or dry? explain?
lora16 [44]

When the soil is dry, it wouldn't be easy to make a footprint so the soil must be moist. Later, the print would harden and that preserves the footprint.  

Overall: soil is moist.

4 0
3 years ago
Other questions:
  • The sum total of all the chemical changes that an organism performs to maintain its life and produce energy is the result of
    5·1 answer
  • PLEASE HELP!!!
    14·2 answers
  • What causes plates to move on the mantles surface?
    14·1 answer
  • The flowering plants are the most numerous group of living plants, with about 260,000 species. Which of the following accounts f
    8·1 answer
  • The Himalayan mountains were formed from ? A convergent boundary between two continental plates, ...
    6·1 answer
  • What is natural selection and how does it lead to diversity in organisms?
    6·1 answer
  • An 8-year-old girl has had difficulty swallowing for the past day. On examination, her pharynx is swollen and erythematous with
    11·1 answer
  • Most of the planets that have been discovered using the transit method have had large diameters. Why?
    7·1 answer
  • What does scientific theory means
    8·2 answers
  • What is the focus of ecosystem based management
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!