Search over 10,000 free study notes

Traditionally we have classified living organisms into groups based on their structure and morphology (essentially how they look!). This was a system developed by a scientist called Linnaeus in the 1700's...

Prokaryotic and eukaryotic cells vary in may ways:Size: Prokaryotic cells are smaller than eukaryotic cells. Prokaryotic cells have a diameter of 0.1-0.5 micrometers whereas eukaryotic cells have a larger...

In all the species that reproduce sexually, there are three main mechanisms that contribute to genetic variation:independent assortment of chromosomes, crossing-over, and random fertilization. Independent...

In the every cell of the human body, there is a part called the nucleus - this contains all of the genetic information. In each cell nucleus there are 24 pairs of chromosomes. They come in pairs because w...

A simple way of thinking about why enzymes catalyse only specific reactions is to think of the enzyme and the substrate (the compound the enzyme is acting upon) as a lock and key system. Enzymes have a pa...