So you know what is what and where it goes
The extermination of the dinosaurs, the start of a rise to dominance of mammals and a meteorite effect in mexico marks the boundary among the mesozoic and the cenozoic or as named as the k-p boundary. In addition, the cretaceous paleogene (K–Pg) boundary which is previously recognized as the cretaceous tertiary (K–T) boundary is a geological signature typically a thin band of rock.
B . By altering the enzyme's shape and structure due to a change in its optimal pH.
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hope it is helpful to you
I believe it is “animals and plants caanot directly use all the nitrogen found in our atmosphere”
