A commonly used municipal wastewater treatment to restart activated sludge bioreactors. Which technique is involved in this remediation process?

#Question id: 5014

#SCPH28 | Zoology

 Following geological time period and major evolutionary event?

I. Devonian                            A. Gymnosperms dominant

II. Jurassic                               B. Amphibians diversify; first reptiles

III. Carboniferous                  C. Mammals appear

IV. Triassic                           D. Seed plants appear

#Question id: 5015

#SCPH06 I Botany

 During which of the following largest mass extinction recorded in the history of life on Earth.

#Question id: 5015

#SCPH28 | Zoology

 During which of the following largest mass extinction recorded in the history of life on Earth.

#Question id: 5016

#SCPH06 I Botany

Approximately how far back in time does the fossil record extend?

#Question id: 5016

#SCPH28 | Zoology

Approximately how far back in time does the fossil record extend?

#Question id: 5017

#SCPH06 I Botany

Arrange these events from earliest to most recent.

1.  emission of lava in what is now Siberia at time of Permian extinctions

2.  emission of lava that solidified at the same time as iron-bearing terrestrial rocks began to rust

3.  emission of lava that solidified at the same time as rusted iron precipitated from seawater

4.  emission of lava in what is now India at time of Cretaceous extinctions