« previous next »

Author Question: The accumulation of free oxygen in Earth's atmosphere began A) with the origin o (Read 1225 times)

Jesse_J

  • Sr. Member
  • ****
  • Posts: 282
on: Jun 13, 2013
The accumulation of free oxygen in Earth's atmosphere began
A) with the origin of life and respiratory metabolism.
B) with the origin of photosynthetic bacteria that had photosystem I.
C) with the origin of cyanobacteria that had both photosystem I and photosystem II.
D) with the origin of chloroplasts in photosynthetic eukaryotic algae.
E) with the origin of land plants.


aero

  • Hero Member
  • *****
  • Posts: 512
Reply #1 on: Jun 15, 2013
I picked C and I got it right, good luck :)


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

Jesse_J

  • Sr. Member
  • ****
  • Posts: 282
Reply #2 on: Jul 4, 2013
Thank you so much, I marked it solved ;D


« previous next »
 

Did you know?

In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

Did you know?

Recent studies have shown that the number of medication errors increases in relation to the number of orders that are verified per pharmacist, per work shift.

Did you know?

Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.

Did you know?

About 80% of major fungal systemic infections are due to Candida albicans. Another form, Candida peritonitis, occurs most often in postoperative patients. A rare disease, Candida meningitis, may follow leukemia, kidney transplant, other immunosuppressed factors, or when suffering from Candida septicemia.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

The human oxygen-hemoglobin dissociation curve. The human oxygen-hemoglobin dissociation curve.
The Atmosphere of Mars The Atmosphere of Mars
Solar EM Radiation Penetration into Earth's Atmosphere Solar EM Radiation Penetration into Earth's Atmosphere
Free energy diagrams for the simple reaction A ----> B Free energy diagrams for the simple reaction A ----> B
Earth’s Spheres Earth’s Spheres
Earth-Moon-Sun Positions during the Spring Tide Earth-Moon-Sun Positions during the Spring Tide
Video: Glomerubular filtrate rate -pressures that affect GFR and net filtration pressure

For a complete list of videos, visit our video library