hunNikkidNanaK hunNikkidNanaK

12-11-2015
Chemistry

contestada

Ancient cyanobacteria released ______, which assisted in creating the atmosphere as we know it today.
A. lead
B. hydrogen
C. oxygen
D. ore

Respuesta :

12-11-2015

Ancient cyanobacteria released hydrogen which assisted in creating the atomsphere as we know it today.

Answer Link

Otras preguntas

What is a chemical equation?

Respond Discuss the roles of Imagery, Connotation, Tone and Theme in understanding any text, and discuss the Imagery, Connotation and Tone and their relationshi

Select the sentence that uses correct parallel construction. A. The student body president would organize pep rallies and getting better food in the cafeteria.

Water was pumped from a tank at a constant rate. The initial volume of the tank was 89.4 gallons. It took 6 minutes to completely drain the tank. What was the r

can someone please explain how to do this...

1235678Which statement best describes stocks?O They should be purchased when prices are high and sold when pricesO They are an investment in a company's progres

5 of 52Warm-UpThe hydrosphere and atmosphere can physically shape thegeological formations on Earth's surface.Use the Notebook tool (G) to write about one natur

Grendel kills the Danes in Herot.Why did this happen?

The moving average generates buy signal(s) __________. A) on days 3, 11, and 15 B) on days 2, 8, and 16 C) on days 5, 9, and 13 D) on no days

Read the text "Reliving the last days of the dinosaurs"by Beth Geiger.The asteroid wiped out 75% of species on Earth,including the dinosaurs-but other species s