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
Kitty [74]
3 years ago
7

What evidence BEST supports the presence of atmospheric oxygen 2.7 billion years ago?

Biology
1 answer:
Serhud [2]3 years ago
7 0

Answer:c

Explanation:layered iron rust in rocks

You might be interested in
What is the result of direct competition in nature?
DIA [1.3K]
Extinction of losing its species hope this helps you
4 0
3 years ago
Which one goes to the right one
-BARSIC- [3]
U still have school its summer
4 0
3 years ago
Another one maybe? Please help! The function of messenger RNA (mRNA) is:
xz_007 [3.2K]

Answer:

b

Explanation:

6 0
3 years ago
In a cross between two heterozygous individuals (eg. Rr X Rr), the expected phenotypic ratio of the offspring would be A) 1:2:2:
geniusboy [140]
3:1.<span> The physical appearance of the </span>offspring<span> will be 3 </span>organisms<span> that look like the </span>parents<span>: 1 individual that differs in appearance.</span>
7 0
3 years ago
Read 2 more answers
The light-independent reactions of photosynthesis, also known as the Calvin cycle, use and produce a variety of molecules. Sort
Margaret [11]

Molecules brought in and used in the calvin cycle - Carbon dioxide (CO_2) , Ribulose bisphosphate (RuBP)

Molecules produced during the calvin cycle that leave the cycle - a few of the glyceraldehyde-3-phosphate (G3P), NADP+

Molecules used and regenerated within the calvin cycle - most of the Glyceraldehyde-3-phosphate (G3P) , NADPH

<u>Explanation:</u>

Calvin cycle is the light independent reaction that takes place in the stroma of the chloroplast. Calvin cycle uses ATP and NADPH produced during the light reaction. Calvin cycle occurs in 3 steps, they are:

1. Carbon fixation - (CO_2) combines with Ribulose bisphosphate (RuBP) to form 2 molecules of 3-phosphoglyceric acid (3-PGA).

2. Reduction - ATP and NADPH is used to convert 3-PGA into glyceraldehyde-3-phosphate (G3P).

3. Regeneration - some G3P molecule form glucose while other regenerates to form RuBP acceptor.

8 0
2 years ago
Other questions:
  • You start to roll backward down a hill on your bike, so you use the brakes to stop your motion. In what direction did you accele
    10·1 answer
  • Stars change over millions of years.<br>O True<br>O False​
    9·1 answer
  • Check the correct statements regarding a compound and a molecule:
    6·2 answers
  • Drag and drop a term to match these examples with the correct level of organization.
    10·1 answer
  • In what form is coded information found in DNA? letters of the alphabet the type and sequence of molecules along each strand no
    6·1 answer
  • Describe the two types of root systems.compare and contrast
    9·1 answer
  • Burrowing animals like this one dig holes in the ground, breaking up soils. What kind of weathering is this?
    6·1 answer
  • What kinds of characters can you use to create a data matrix for estimating phylogenetic trees?
    15·1 answer
  • Among us code:<br> SRCSMF
    11·2 answers
  • How is the process of photosynthesis taking place thru Calvin Cycle?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!