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
Elodia [21]
2 years ago
11

When did oxygen begin to accumulate in the atmosphere

Biology
2 answers:
maxonik [38]2 years ago
8 0
2.4 billion years ago the oxygen concentration in earth’s atmosphere increased suddenly from trace amounts to appreciable quantities
oee [108]2 years ago
4 0

Answer:

2.33 billion years ago.

Explanation:

Hope this helps <3

You might be interested in
Equilibrium is attained when ______
Vikentia [17]

Answer:

When the rates of the forward and reverse reactions have become equal to one another, the reaction has achieved a state of balance. Chemical equilibrium is the state of a system in which the rate of the forward reaction is equal to the rate of the reverse reaction.

Explanation:

Sorry if incorrect

5 0
3 years ago
The combining form referring to the organ located within the cranium that is the center for coordinating body activities is:
jeka57 [31]
<span>The corpus callosum is the superficial organ of the cerebral cortex that coordinates the activities of the body through the right hemisphere and the left hemisphere. The combined form occurs through synchronization of both hemispheres of the brain and is connected by the corpus callosum.</span>
3 0
3 years ago
The phylum Cycliophora was discovered in 1995. They are tiny organisms that live in large numbers on the outsides of the mouthpa
Viefleur [7K]

Answer:

The answer is letter B. Eumetazoa and Lophotrochozoa

Explanation:

Eumetazoa and Lophotrochozoa

Because the phylum Cycliophora neither helps or harms its lobster host.

6 0
3 years ago
Identify this functional group
Murljashka [212]

Answer:

Hydroxyl

Explanation:

Hydroxyl groups are simple structures consisting of an oxygen atom with two lone pairs bonded to a hydrogen atom.

A hydroxy or hydroxyl group is a functional group with the chemical formula -OH and composed of one oxygen atom covalently bonded to one hydrogen atom.

Using these given definitions, a hydrogen bond is labeled with one linkage, while a covalent bond is with two links to the Carbon Atom.

See attached image for a similar diagram for proof.

8 0
3 years ago
The nervous system isn’t only
masya89 [10]
What’s the rest of the question
5 0
3 years ago
Other questions:
  • The earths is a thin layer of rock that surrounds the earth
    13·1 answer
  • How does the density of warm water and cold water compare
    14·2 answers
  • To determine whether ammonia is produced from peptones (proteins), ____________ is added to the sample and will change color if
    9·1 answer
  • The somatosensory cortex is responsible for processing ________.
    5·1 answer
  • Which cold-related emergency is characterized by localized itching, redness, and recurrent edema on exposed or poorly insulated
    12·1 answer
  • During Anaphase I in Meiosis, what major event takes place Question 25 options: Sister chromatids are pulled apart. Chromosome p
    13·1 answer
  • The bacterial species Staphylococcus aureus is found on the skin and in the nasal passages of about 20% of the human population.
    15·1 answer
  • How does your sympathetic nervous system use feedback to keep you
    10·1 answer
  • What is the primary mechanism by which ach is cleared from the synaptic cleft?
    12·1 answer
  • Cold food should be stored at a maximum internal temperature of 41 degrees F or lower.
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!