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
Hunter-Best [27]
3 years ago
5

¿A qué se debió el incremento en la cantidad de oxígeno en la atmósfera hace miles demillones de años?

Biology
2 answers:
vichka [17]3 years ago
5 0

Debido a que el hidrógeno molecular expulsado por los volcanes se difundió en el espacio, la Tierra ganó una atmósfera rica en oxígeno. Otra posibilidad es que el oxígeno se acumule debido a una disminución de gases – como el hidrógeno – que reaccionan con y por lo tanto "absorben" el oxígeno.

Explanation:

nadezda [96]3 years ago
4 0

Answer: Some authors suggest the rise in oxygen about 2,470 – 2,450 million years ago was related to extensive volcanic activity,

Explanation:

You might be interested in
Natural selection can operate on predator populations as well as on prey. Suppose that over time trees became covered in lichen
aleksandrvk [35]
All light moths will be better camouflaged on lichen-covered trees. So, their predators could hardly notice moths on the trees and number of predators will decrease for a while. Predators could then change hunting strategies or seek for other sources of food. Also, let's assume there is variability in eyesight between predators, so those with better eyesight will have greater chance to notice moths and will become more common.
5 0
3 years ago
Read 2 more answers
A chemical has an amine group and an organic acid group (carboxyl group). It does not however, have any peptide bonds. It is
777dan777 [17]

Answer:

An amino acid

Explanation:

Amino Acid:

  • An amino acid, the building block of a protein, is a biomolecule that contains the amino (-NH3+) and carboxylate (-COO−) groups.
  • Amino acids also contain an organic R- group that defines the properties of the amino acid.
  • R-groups classify amino acids into different categories such as non-polar, polar, acidic and basic.
  • The carboxyl group of an amino acid combines with the amino group of another amino acid to form a covalent amide bond or a peptide bond.
  • Amino acids form polypeptides by the formation of peptide bonds.
8 0
3 years ago
Which human activity is most affected by the increasing number of dead zones in the ocean?
Oxana [17]
Over use of plastic have an amazing day!
6 0
3 years ago
Tunicates resemble a _____ on the sea floor
Serga [27]
<span>Tunicates resemble a rod on the sea floor.

Tunicates are members of the phylum Tunicata, and are intvertebrate animals. They are commonly known as sea squirts.

</span>

<span>Thank you for posting your question. I hope you found what you were after. Please feel free to ask me more.</span>

3 0
3 years ago
Read 2 more answers
Which of the following is not a necessarily factor involved in creativity?
kakasveta [241]
Being original , it’s not really creative
8 0
3 years ago
Read 2 more answers
Other questions:
  • Auxins regulate or influence which of the following?
    9·1 answer
  • The insertion of how many nucleotides into a genetic sequence does less damage to the code than the insertion of other numbers o
    7·1 answer
  • What is an example of a muscle of facial expression?
    5·1 answer
  • If you placed the letter g under a microscope, how would the image look in the field of view and why?
    9·1 answer
  • Benji is a show dog who needs a fancy and expensive dogfood fortified with macromolecules to help him maintain a glossy coat, st
    8·2 answers
  • Guided Practice
    15·1 answer
  • In the example below the scientific method is used to solve an everyday problem. Match each component to the appropriate step in
    5·1 answer
  • HELP which one?<br> Please don’t lie I need help
    8·2 answers
  • What is oxygen debt​
    11·1 answer
  • Which is NOT an example of leaves humans commonly eat?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!