The cell cycle is divided in two main events : interphase and mitosis. However, those two phases have further sub-divisions.
The presence of specific types of enzyme for a substrate means that the food where the substrate is found, is included in the animal's diet.This is because having a specific enzyme means that it is able to digest the food into useful molecules for energy and constant growth.
Reproductive success is defined as the passing of genes onto the next generation in a way that they too can pass on those genes. This is not solely the number of offspring produced by an individual, but also, as Ronald Fisher outlined in 1915, the probable reproductive success of those offspring, making mate choice (a form of sexual selection) an important factor in this success,[1] making biological fitness a key element in the theories of natural selection and evolution.
The extrusive rocks are rocks that have been formed by the very quick cooling of the magma on the surface, be it on land or in water. The magma practically gets pushed towards the surface, and because the surface is much cooler, the magma cools off very quickly and forms the extrusive rocks.