Ammonium can be assimilated via an alternative pathway rather than primary pathway which involves the sequential actions of glutamine synthetase(GS) and glutamate synthase(GOGAT), these alternative pathway catalyzes by enzyme known as,

#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

#Question id: 5017

#SCPH28 | Zoology

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