In the past, mass extinctions encouraged the rapid evolution of surviving species
select one:
a. because they killed all organisms that had co-evolved
b. becaused they apred all organisms that had evolved at the same time
c. by making new habitats available to them
d. by changing developmental genes

not sure if this what   you'r looking for would be percent composition

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

transformative rocks are the stones that emerge from the transformation of existing rock composes in a procedure called changeability, implies changing of structures. transformative rocks are shaped from alternate shakes that are changing a result of warmth or weight connected. one of this model is the earth developments that making rocks profoundly cover or crushed which will make the stones warmed and put under awesome weight. they are not softening but rather the minerals they are containing are changed synthetically that will shape transformative rocks. now and again different rocks are shaped when the others are near some liquid magma and getting warmed.