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
What would occur if you forgot to add dntps to your pcr sample?
Crank
No reaction would occur. because in PCR ,dNTP is crucial factor for polymerisation of primer . DAN polymerase bind to primer and template 
3 0
3 years ago
URGENT!! PLEASE HELP!!!
nadya68 [22]
In complementary base pairing, the G pairs with C, and A pairs with T. Given that this be the rule, the complementary nucleotides for your sequence would be as follows: CGATTAACGTAGGCA.

With regards to proofreading, mutations in cell division occur once in around every 100,000 base pairs. If this happens, the enzyme that pairs the nucleotides to form DNA, called DNA polymerase, detects the error and moves back along the strand, it then cuts the incorrect nucleotide and replaces it with the correct one, fixing the error and continuing with the DNA synthesis.
This process corrects the majority of errors in DNA synthesis, but some errors can still be missed by the DNA polymerase, this is then rectified by a protein complex which binds to the incorrect pairing until anther complex, comes along and cuts that particular section of DNA out, which is then replaced by a new section of correct nucleotides synthesized by the polymerase enzyme, the two sections at either end that were cut is then sealed by ligase, an enzyme which essentially "glues" the DNA stands back together.

My apologies for the long answer, I hope I answered your question and that you understand it well enough.
3 0
3 years ago
Read 2 more answers
What is the best definition of activation energy
coldgirl [10]
<span>The lowest quantity of energy that the reacting species must possess in order to undergo a specified reaction.</span>
8 0
4 years ago
Read 2 more answers
HELP! 10 Points for greatest answer!
bixtya [17]

Answer:

The Amazon is a critical absorber of carbon of carbon dioxide, a greenhouse gas produced by burning fossil fuels, like oil and coal. ... The Amazon absorbs 2 billion tons of CO2 per year (or 5% of annual emissions), making it a vital part of preventing climate change.

Explanation:

8 0
2 years ago
please write a summary on base pairing. The main facts doesnt have to be long it can literally be one sentence about base pairin
hammer [34]
Can you be more specific with the question. Are you talking about DNA coding with complementary bases?
7 0
3 years ago
Other questions:
  • Just a reminder to take a break! Your brain is hurting and you need some water! Use this app to understand not to cheat too!
    5·1 answer
  • What process exerts the pull on water molecules that is relayed from leaf to root via cohesion?
    9·2 answers
  • Which type of organic molecule is a starch?
    13·1 answer
  • Safety Equipment Checklist
    8·1 answer
  • An object is moving north at a constant speed. A force of 5 N begins to push the object east at the same moment that a force of
    5·2 answers
  • What name is given to elements with the same number of protons but differing numbers of neutrons? ions acids isotopes bases
    6·2 answers
  • Sequence of dna that is not involved in coding for a protein
    5·2 answers
  • All three types of rock form in which earth layer?
    15·1 answer
  • Need help here plss
    14·1 answer
  • Atoms in triglycerides could be used in the synthesis of dna. which metabolic intermediate and pathway will function as crossove
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!