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The pioneer species (or any other species) changes the environment, making it less hostile. Also some species are better competitors and out-compete others.

Enzymes are functional proteins which are used to catalyse reactions. They all exhibit primary, secondary and tertiary structure, and some which have more than one polypeptide chain have quaternary struct...

In the population, there is genetic variation with some individuals possessing allele p and some possessing allele q. Predation by wolves acts as a selection pressure on the genetic variation in the popul...

ATP is constantly being produced in every mitochondrion of the cell, but it can't be stored within it. This is directly related to the properties of this important molecule - the phosphate bond between th...

DNA is unziped by DNA helicase. RNA polymerase catalyses the formation of a complementary strand of pre-mRNA, using the non-coding strand of DNA as a template. The pre-mRNA contains non-coding regions (in...