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
Harrizon [31]
3 years ago
8

Before the evolution of life produced the process of photosynthesis, small amounts of oxygen were added to the earth's atmospher

e by the process of
Biology
1 answer:
Veronika [31]3 years ago
5 0
I think it's Photosynthesis because photosynthetic bacteria began producing excess oxygen, which added oxygen to the Earth's atmosphere.
You might be interested in
Describe the pros and cons of the treatments used for each of the sickle cell anemia patients investigated in this activity.
notka56 [123]
Sickle cell anemia is caused by an abnormal hemoglobin in red blood cells. hemoglobin is the red pigment found in red blood cells for carrying oxygen.The abnormality arises from a genetic mutation in the DNA gene that codes for the  beta chain of the protein called globin of which hemoglobin is made of.In the beta chain, the sixth amino acid called glutamine is replaced by another one called valine.<span>This one change in the amino acids cause the hemoglobin protein  to behave abnormally, causing  red blood cells to lose their normal spherical shape and become bent like a sickle, hence the name "sickle cell" anemia</span>
5 0
3 years ago
Which of the following is the process by which energy
Archy [21]
D- Reflection

I hope I helped!
8 0
3 years ago
Read 2 more answers
Create a food web by typing the name of 6 organisms. Be sure to label each organism. (Consumer, producer, decomposers, primary c
dolphi86 [110]
Hope it helps ksksksksksksksks

5 0
3 years ago
1 pts A woman with Type B blood who's father was Type O blood marries a man with Type AB blood. What are the possible blood type
Naddika [18.5K]

Answer:

The children can have all of the following, AB, A and B.

Explanation:

Within a Punnett square, BO and AB can only make AB, Ao, BB and BO.

4 0
2 years ago
What is element. give 3 example​
IRINA_888 [86]

Answer:

An element is. a parcel where it is made up of only one kind of particle called atom is known as element.

eg. oxygen

hydrogen

gold

silver

carbon

Explanation:

hope it helps you

4 0
3 years ago
Other questions:
  • During which phase of mitosis does the nuclear envelope reform?
    14·2 answers
  • Is art universal? Why or why not? t?
    9·2 answers
  • Henry is interested in studying the different techniques perching birds use to build their nests. What type of investigation wou
    13·1 answer
  • Why do most vaccinations have names like Hong Kong, Shanghai, etc..?
    6·1 answer
  • why do ecosystems require continuous input of enery from the sun and what is the process that converts the sun energy chemical e
    6·2 answers
  • Which of the following is a characteristic of fermented foods?
    15·2 answers
  • 11. A particular genetic disorder is associated with a
    6·1 answer
  • 1. Write out the reaction equation for photosynthesis. Explain where the
    10·1 answer
  • Carbon monoxide (CO) is an odorless, colorless, and tasteless gas that is toxic in high enough concentrations. It can be a by-pr
    9·1 answer
  • LISA is an example of a(n): A) enzyme assay. B) biological assay. C) binding assay. D) immunological assay E) none of the above
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!