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
Elan Coil [88]
4 years ago
6

Before there was life on earth, which gas was absent from the ancient atmosphere?

Biology
1 answer:
Damm [24]4 years ago
4 0
D oxygen there was no free oxygen on the earth
You might be interested in
How the body defends itself against infection
dsp73

Answer: poop

Explanation: if you cover yourself in poop it heats your body up an animal does this but i cant remember which one

3 0
3 years ago
Read 2 more answers
Number 4,5,6 ! Please helps me
Vlad [161]
For questions four plants make their own food which is oxygen gas. This oxygen gas, is an important part of the air, the gas that plants and animals must live on. When people breathe, it is oxygen that we take out of the air to keep our cells and bodies alive. 

4 0
3 years ago
Which material is an aqua layer most likely made of
e-lub [12.9K]

Answer:

An Aquifer layer is most likely made up of cracked rocks.

EXPLANATION: Various unconsolidated materials like silt, sand, or gravel are also a part of this material

4 0
3 years ago
If the intesnsity of light being deceted by light it will make the eye close . This is an example of a behavioral response that
Nezavi [6.7K]
It needs waves and photons
4 0
4 years ago
An advantage of internal fertilization over external fertilization is that_____
Serhud [2]
So you poop on your mom so you and your mom can vibe thank you Andrew welcome

7 0
4 years ago
Other questions:
  • Rising water temperatures is a result of global warming and may eventually increase sea levels due to the dissolving of what?
    12·1 answer
  • From a global environmental standpoint, why should people in North America be concerned about rain forests in South America, Asi
    6·1 answer
  • What is the relationship between potential and kinetic energy?
    6·1 answer
  • When a mixture of live nonvirulent bacteria and dead virulent bacteria was injected into mice, Griffith unexpectedly found that
    15·1 answer
  • What is plate boundary
    8·1 answer
  • Which of the karyotypes shown is from a normal female?
    15·2 answers
  • PLEASEEE HELPPPPPPPPPP​
    15·1 answer
  • I need help with this one question
    7·2 answers
  • PLEASE I NEED THE NAME OF THESE FOSSILS AND PUTTING THEM IN ORDER I WILL GOVE BRAINLIEST
    11·1 answer
  • Explain why fermentation wold take over and not the krebs cycle.how long would it last?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!