Biology Essays

When evaluating aggression as a behavior we have to consider a person’s intentions as well as the outcome. Elliot Aronson defined aggression as ‘behavior aimed at causing harm or pain’. The act of aggression can be seen to be expressed in two different ways depending on where it is assumed …

The short story “How to Build a Slaughterhouse” by Richard Selzer, can be looked at as a metaphor for the Nazi interment camps. The author portrays the slaughterhouse as a very uniform killing factory, much like the interment camps in Nazi Germany. The workers are so numb to the killing …

Memory is very complex and a little mysterious. There is a lot to know about the way one can organize a lifetime of memories. Research has helped clarify several missing elements in the traditional three-stage memory model. One can now understand the way information is changed as it is encoded, …

Aim In this experiment I will be testing the effect of temperature on the plasma membrane of a beetroot. I will do this by measuring the percentage light transmission using a spectrophotometer. Once I have obtained my results, I will justify them using scientific knowledge explaining what I have observed …

My hypothesis is that we should be able to see all the parts of a human eye (that we’ve been studying from the text book) in the cow’s eye. This is my hypothesis because just from my knowledge, I think cow’s need to see as well as humans do. They …

An investigation to compare the reaction rates between potato and hydrogen peroxide against liver and hydrogen peroxide through loss in mass. Background information: Catalase is an enzyme that is found in all cells. This means that it is an intracellular enzyme. And enzyme is a biological catalyst. A catalyst is …

I have been asked to investigate the effects of osmosis on potato cell sap. I will test potato cylinders in different strengths of sucrose solution and record any results in a table. I will then analyse my findings and work out the isotonic point of the potato cell sap. Prediction …

Celebrities are constantly in the media for their outrageous or strange antics. People such as Robbie Williams, The Cheeky Girls and most Big Brother contestants are well known for their headline grabbing shenanigans. But some stars complain that they do not get the privacy they deserve. Nowadays it doesn’t take …

The Diathesis-Stress Model illustrates the dynamic between a diathesis and an individual’s stress and how the effects of this dynamic can influence an individual’s behavior. A diathesis is a person’s predisposition towards developing a disorder. A predisposition towards a disorder can be caused by one or a combination of biological, …

Homeostasis is the ‘maintenance of equilibrium in a biological system by means of an automatic mechanism that counteracts influences tending towards disequilibria’. Homeostatic mechanisms operate at all levels within living systems, including the molecular, cellular, and population levels. in humans homeostasis involves the constant monitoring and regulating of numerous factors …