Biology essay samples

Free EssaysBiology

AIDS

AIDS is a serious infectious disease caused by HIV virus, which damages the immune system. If a person is infected, it is harder for him/her to fight other infections. The disease was discovered in 1983 in the US. Today it is widespread in many ...

Benefits of Breastfeeding

Breastfeeding itself as a process is the feeding of a baby with breast milk from female breasts (for example, via lactation), mainly ignoring formula feeding which is not natural. Newborns are able to suck breast milk since they have an inborn ...

Darwin Theory

Sir Winston Churchill once said, “All great things are simple”. This statement concerns discoveries as well. Today, all great discoveries seem to be simple, from wheel machines to the Einstein’s theory of relativity. Thus, there ...

Down’s Syndrome

In the world today, there are many events that require more than ordinary attention. Such cases demand serious concerted efforts either to alleviate undesirable consequences or improve the quality of life of the affected people. This paper will talk ...

Genetically Modified Animals

For centuries, people have been changing the genomes of plants and animals by using traditional methods of selection. The artificial selection of the desired properties led to the breeding of a various species ranging from sweet corn to bald cats. ...

Geology Field Report

The coastline of Pembrokeshire displays greater scenery and rocks than any similar area in Britain with an exposure of over 250 miles. The underlying rocks, making the landscape, are ancient since they were built before the end of the carboniferous ...

Menopause and Aging

Summary Every organism undergoes various biological changes in the process of growth and development. Organisms undergo three major steps in their lifespan, which include growth, development and ageing. According to studies, three aspects of life ...

The relationship between avian sexual displays/courtship behaviors to their relative hormones

This paper, by reviewing a number of books, articles, and research papers on the relationship between avian sexual displays/courtship behaviors to their relative hormones, aims to describe the current status of affairs in this field, pointing the ...

Ultraviolet

Introduction When rays reach the Earth, they change their property at the Earth's atmosphere, and are partly absorbed by ozone, small droplets of steam and air components such as oxygen, nitrogen, or carbon dioxide. The light includes three ranges ...

Wastewater Recycling

The global shortage of water resources makes people think about the possible solutions and ways out of this problem. The lack of fresh water supply hits the economy, affects the agricultural sector, and poses a risk of running out of water. ...
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