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Biology Subject Essay Examples

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Reproductive Isolating Mechanisms

In the 1940s, Ernst Mayr created the term Biological Types Idea that was subsequently extensively welcomed by the scientific community. The definition mentioned that "Species are groups of in fact or potentially interbreeding natural populations that are reproductively separated from other such groups". Specific mechanisms remain in place to avoid species from interbreeding with others and these are described as reproductive separating systems, which are biological incompatibilities. There are many mechanisms acting on natural populations and these are broadly grouped…...

Effects of Tonicity on Cell Membrane

Abstract The purpose of this experiment was to determine the results of tonicity on a cell membrane using red cell, potato strips and three unknown services (A, B, C). First three slides were prepared consisting of RBC's and unknown options A, B and C. A control slide was prepared only utilizing RBC's. After observing each slide under the microscope it was figured out that unidentified option A was hypertonic because the RBC appeared to have actually diminished. The RBC in…...

Germs: Bacteria, Viruses, Fungi, and Protozoa

A virus is a small infectious agent that replicates only inside the living cells of other organisms. Viruses can infect all types of life forms, from animals and plants to bacteria and archaea. Characteristics: Like living organisms, viruses contain nucleic acids and proteins. Inside living cells, viruses can reproduce, but not by the process of mitosis like most living cells. Viruses lack some characteristics of living organisms. Outside of living cells, viruses are not alive. Structure/Shape: A virus structure can…...

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Chick Growth Enhancer

ABSTRACT The study is entitled “Aloe Vera as Chick Growth Enhancer”. Specifically, it sought to find out the efficacy of Aloe Vera as a growth enhancer in broiler chicks. The study aims to produce a low-priced but high quality growth enhancer by using Aloe Vera as a main component. Twenty-one day old straight run broiler chicks were used in the study and were distributed to a cage with a dimension of (33 x 57). The cage was further subdivided into…...

Never Let Me Go by Kazuo Ishiguro

Over the past century, biological engineering has made a huge step forward. They made possible to duplicate human DNA in order to produce a genetic replicate. The novel “Never Let Me Go” by Kazuo Ishiguro in the fiction story of three friends, as the products of genetic cloning, illustrates the negative view of the human nature. This novel, through the eyes of Kathy H. , shows what it means to be a clone and what problems they experienced growing up.…...

Lactobacillus Bulgaricus

The full name of Lactobacillus Bulgaricus has been recently changed to Lactobacillus delbrueckii subspecies Bulgaricus and is the main bacteria used for the product of the original Bulgarian yoghurt known for its positive health effects. The reason this lactic bacteria is named after the country name Bulgaria is because it only lives in its natural form on the territory of Bulgaria. Any products claiming to contain Lactobacillus Bulgaricus and not manufactured in Bulgaria and very unlikely to contain the original…...

Wildlife Biologist

* Who is a Wildlife Biologist? Description of the kind of work done, Description, Advantages/disadvantages, working conditions. * Education and Work Education and training, Job outlook, Education and training needed Prospective locations of work, Improvement chances. * Just how much does a Wildlife biologist make? Salary variety, Salary/wages * A day as a Wildlife Biologist Normal work day-- kinds of tasks the career involves, working conditions * Why I selected Wildlife Biology. An explanation of why you chose this profession,…...

Are Fingerprints Inherited?

My science fair project is called “Are Fingerprints Inherited?” I will try and determine if fingerprint patterns from biological siblings are inherited however, I will also have control so that I can compare the data. I am interested in finding the results of this because of me having an half brother and sister. I will use a table to take fingerprints and next to each fingerprint is a code so I don’t use names on the same page as the…...

The Amoeba Falls

The amoeba falls under the classification Euklaryota. It is part of the Protista kingdom which is made up of the simplest known eukaryotes. These organisms are single celled with a membrane surrounding the nucleus. The amoeba genus has over 290 million species. The amoeba cell is described as riged with extending pseudopods located at the anterior side of the cell. The pseudopods are used to move the cell around. It also has extensions on the upper side. The pseudopods also…...

Polar Bears

Class: Ursidae. 9b Physical qualities: Bears have big heads, round ears, little eyes that deal with forward, extremely short tails, and stocky legs. They are plantigrade, strolling on the heels and soles of their feet like human beings do. Each paw has 5 curved claws that are not retractable, or can not be pulled back. Habitat: The polar bear environments include the entire Arctic area. Polar bears have adapted to be able to reside in the water and on land.…...

The Structure of Cells

Cell structures come in various shapes and sizes dependent on their location within an organism and what life sustaining process it carries out. These can range from the globular protein of a red blood cell, designed to carry four oxygen molecules at a time to the tail like flagellum of a bacteria designed for mobility and penetration of organs within a body. There are tow major types of cells, prokaryotic cells and eukaryotic cells. An organelle is defined as an…...

Cell Organelle

In cell biology, an organelle (pron.:/ ɔrɡəˈnɛl/) is a specialized subunit within a cell that has a specific function, and is usually individually enclosed within its own lipid bilayer. The name organelle originates from the idea that these structures are to cells what an organ is to the body (thus the name organelle, the suffix -ellebeing a small). Organelles are identified by microscopy, and can likewise be purified by cell fractionation. There are lots of types of organelles, especially in…...

The Tasmanian Tiger

The Tasmanian tiger, also called a thylacine, has probably been extinct for about 65 years. In the nineteenth century European settlers hunted these animals due to the fact that they thought the thylacines were primarily responsible for the death of their livestock. This, combined with other elements such as illness and competitors from the dingo, had ultimately resulted in the demise of this mystical species that was feared and misconstrued. The thylacine, formerly discovered in Australia, is in fact a…...

Schmidtea Mediterranea: Observations and Experiments

The strain used for these experiments is the asexual Schmidtea mediterranea. The animals were kept in a dark room with a constant temperature of 20В°C. Medium was prepared by adding 1.6mM NaCl, 1mM of CaCl2, 1mM of MgSO4.nH2O, 0.1mM of MgCl2.6H2O, 0.1mM of KCl and 1.2mM of NaHCO3 to Milli-Q water. The medium was changed every seven days, along with the feeding of the animals using veal liver. The worms were starved for 7 days before the experiments. Treatment with…...

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