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
Tema [17]
3 years ago
9

Which was least likely to have been a component of Earth’s atmosphere before life began?A-sulfurB-carbon dioxideC-oxygenD-water

vapor
Biology
1 answer:
Burka [1]3 years ago
8 0

The correct answer is Oxygen.

The surface of the Earth was liquefied. As the Earth cooled, an atmosphere generated primarily from gases erupted from volcanoes. It constituted methane, hydrogen sulfide, and ten to 200 times as much as carbon dioxide in comparison to today's atmosphere.

It was considered that there was an extreme volcanic activity for the initial billion years of the existence of the Earth. The initial atmosphere was possibly majority carbon dioxide will no or little concentration of oxygen. There were slight quantities of ammonia, water vapor, and methane.

You might be interested in
In order for proteins synthesis to acquire both transcription and translation must occur which of the following statements descr
pashok25 [27]
Answer: In transcription, the genetic code of a DNA molecule is encoded. Translation is the process of converting DNA Code into a code that RNA can use.
3 0
2 years ago
How are dry and cold biomes similar and different?
Vera_Pavlovna [14]

Answer: Well for starters they have Resources that animals need and habitats where they live also certain animals belong in certain climates like if it was a cold region then snow leopards polar bears seals penguins etc. they can thrive in those regions while like bears Lions gazelles thrive and warmer and dryer regions

Explanation:

4 0
4 years ago
Which two elements are in the same Period?
aksik [14]
<span>https://www.ptable.com/
b. Boron and Carbon 
and here's a periodic table to help you
</span>
7 0
3 years ago
Which of the following is true about natural selection? A. Natural selection does not cause a species to change. B. Natural sele
amm1812
These are all true except <span>"D. Natural selection usually causes a species to change suddenly," which is false. Natural selection and the subsequent changes to a species takes many thousands of years to have observable results. </span>
6 0
3 years ago
Read 2 more answers
How does fluid enter the lymphatic system?
mixas84 [53]
A.high blood pressure causes fluid to leak from..
6 0
3 years ago
Read 2 more answers
Other questions:
  • Which medical term means a small circumscribed elevation on the skin?
    10·1 answer
  • The polio virus can cause skeletal muscle paralysis by destroying neuron cell bodies. identify the area of the spinal cord that
    11·1 answer
  • Where does DNA replication happen?
    13·2 answers
  • Gulf sturgeons, a type of fish, live in saltwater along the gulf coast of Florida. They swim upriver to breed in clean freshwate
    8·1 answer
  • Tropical rainsforest cover a small part of the planet
    9·1 answer
  • Which of these genes is not a part of the lac operon?
    12·1 answer
  • Match the part of the system with its definition ​
    15·1 answer
  • Jim is weighing an egg on an old triple beam balance, and he cannot adjust the rusted weights appropriately to balance the scale
    10·1 answer
  • The speder is in which class
    8·2 answers
  • Ribosomal subunits are large complexes composed of numerous polypeptides and at least one rrna molecule. Which subunits include
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!