Biology Essays Examples For College & High School Students in PDF

10822 total results

A Definition and Role of Osmosis (654 words, 3 pages)

Osmosis, why is it so important to all living organisms? If you are someone who enjoys science, biology and other natural sciences then that is a rhetorical question. But to a person who is not into the building blocks of life then it can be a very intriguing and informative ... Read More

An Experiment to Create Chloroplast Suspension Using Spinach Leaves (1549 words, 6 pages)

IntroductionPhotosynthesis is an endergonic reaction that takes place in any living cell that contains chloroplasts. Specifically, photosynthesis takes place in all plant cells and some protists, and it is a non-spontaneous reaction and, therefore, requires an input of energy (Sparks-Thissen lecture).Chloroplasts are roughly 10 micrometers in diameter and consist of ... Read More

The Pros and Cons of Somatic Cell Nuclear Transfer or Therapeutic Cloning (1201 words, 5 pages)

The definition and value of somatic cell nuclear transfer (also known as therapeutic cloning) differs for everyone. While some are opposed to this cloning procedure and show negative responses, others are extremely supportive and are completely for the motion. These varying opinions bring up many questions and debates related to ... Read More

The Environmental Damages of Invasive Species in the United States (3600 words, 11 pages)

Invasive species are an enormous problem in the United States. From the wooly adelgid to the snakehead fish, many invasive species cause a great deal of damage each year. In fact, it is estimated that the environmental damages and other losses from invasive species add up to 120 billion in ... Read More

An Experiment Determining the Effects of Sunlight Variation on Pollinator Activity (1073 words, 9 pages)

IntroductionIn this lab, we explored the changes of sunlight on pollinator activity. Pollinators are the main way for flowering plants to reproduce, and in the times of today, bees have greatly reduced their numbers. No one knows why these pollinators are disappearing. This phenomenon has been named Colony Collapse Disorder. ... Read More

Phytoremediation and an Experiment Testing the Effects That Various Concentrations of Nitrogen Have on the Growth of Duckweed (634 words, 2 pages)

IntroductionSince the beginning of human existence, we have been constantly polluting our environment. Many of these pollutants are heavy metals such as lead, cadmium, mercury and arsenic that have runoff into our lakes and streams (Jarup). In addition to the heavy metals, the use of fertilizers has also increased the ... Read More

Changing the World Through Genetic Modification (788 words, 4 pages)

Every single living organism has cells. And whats inside those cells? DNA, more specifically chromosomes, these chromosomes - which are made up of genetics - control how we look, what our personalities are like, etc. What if we could change those cells? What if we could modify them? Well, we ... Read More

An Overview of the Roles of Enzymes in the Body (341 words, 1 pages)

Enzymes are proteins that catalyze reactions. This means they speed up the rate of reactions that would otherwise take too long to perform in the body. They do this by lowering the activation energy of the reaction. All reactions take some energy to begin start. Some are spontaneous under normal ... Read More

Anatomy of the Brain and Its Impact on the Human Race (744 words, 3 pages)

Anatomy of the Brain and Its Impact on the Human Race An individuals psyche is greatly affected by the physical makeup of their brain. While our environments greatly affect our personalities and vary from culture to culture, differences in temperament and predispositions to certain character traitsdiseases are universal. Modern science ... Read More

The Future of Biomedical Engineering (1665 words, 8 pages)

Bio Engineering is a very recent field involving the problem-solving and ingenuity of engineering and using the sciences of medicine and biology for the development of new medical devices and techniques (CBME, 2016). Bioengineering first became relevant in the late 19th century after German physicist Conrad Roentgen first discovered the ... Read More

The Characteristics of Phylum Chordata and Its Comparison with Three Different Classes (2041 words, 7 pages)

The topic of this report is the phylum Chordata specifically, their characteristics, and a comparison and contrast of three different classes within the phylum Chordata. To better understand the differences within the classes we first need to define the parameters in which the phylum obeys. All chordates are defined by ... Read More

IntroductionWhen biologists refer to the term protists, they can really be talking about a number of different types of organisms. The classification of protists is so wide that it almost feels as though protists are essentially any Eukaryotic organism that is not classified as an animal, land plant, and true ... Read More

A Lab Report on the Experiment of Replicating the Evolution of the Flat Periwinkle (2054 words, 15 pages)

INTRODUCTIONOn the rocky shores of New England, there lives a small but interesting snail known as the flat periwinkle. The flat periwinkle snail has been the subject of study pertaining to natural selection. This is due to the European green crab being introduced in that area around the 1900s. The ... Read More

The Importance of Biodiversity for the Existence of Life on Earth (475 words, 2 pages)

Biodiversity can be referred to as the variation of life on a global level to a specious level. It is of great importance on even the minutest scale, as a simple offset can tip the flow of an entire ecosystem. Biodiversity is a valuable environmental aspect to say the least ... Read More

An Analysis of Polymorphic Mutations in Haplogroups from Africa (1082 words, 9 pages)

ABSTRACTPhenotypic variation in humans has been linked to variation at the genotypic level, particularly in the mitochondrial genome. Human mitochondria are almost always linked to the individuals mother, and these lineages can provide information on human history and migration patterns (Grzybowski, 2012). Polymorphic mutations are placed into haplogroups, believed to ... Read More

A Study of Nutrient Concentration on the Growth of Lemma Minor and Salvinia Minima (2552 words, 20 pages)

ABSTRACTFigure 1 Components of investigation examining the effect of changes in nutrient concentration and competition on growth of Lemna and Salvinia.Figure 1 Components of investigation examining the effect of changes in nutrient concentration and competition on growth of Lemna and Salvinia.Plants that live in aquatic environments are oftentimes subject to ... Read More

The Risk and Ethical Issues concerning the Process of Cloning (973 words, 5 pages)

Human cloning has been a recent issue that is controversial due to the ethics and the questions of morality related to it. Cloning is the practice of using human embryonic stem cells or the creation of embryos to create human beings. Cloning can have potentially lifesaving benefits by generating treatments ... Read More

The Endocrine System and Its Functions (636 words, 3 pages)

Endocrine SystemThe endocrine system is one of the major control systems of the human body. This system is vital for the production, storage, and secretion of various hormones. What makes the endocrine system unique in terms of secreting hormones is the fact that it secretes hormones directly into the bloodstream, ... Read More

A Construction of a Punnett Square to Follow a Mutation (1101 words, 3 pages)

Humans normally have a diploid set of 46 chromosomes in every nucleus of their cells. The very last pair of chromosomes are the non-autonomous sex chromosomes. Males carry an X chromosome and an Y chromosome, while females carry two X chromosomes. An X chromosome when compared to a Y chromosome ... Read More

The Process of DNA Replication and Mutation (975 words, 3 pages)

DNA replication is a multi-step process that is essential to cell division. If DNA is replicated incompletely or incorrectly, then dysfunctional proteins will be produced. Proteins that are dysfunctional or incomplete are undeniable symptoms of DNA mutations and causes of diseases and terminal cancers. As of now, there are 7 ... Read More

An Experiment to Determine the Survival Rate of Rad8, Rad1 and Wildtype Strains of Schizosaccharomyces Pombe During UV Irradiation (1021 words, 9 pages)

Results For the rad8, rad1 and wildtype strains of Schizosaccharomyces pombe there was found to be varying percent survival rates when subjected to different timed doses of UV irradiation (Figure 1). Three separate t-squared test were conducted between each of the three strains. The t-test between the wildtype and rad8 ... Read More

A Study of the Impact of UV Mutation on the Physiological Processes of DNA in Strains of Schizosaccharomyces Pombe (669 words, 3 pages)

The following study was conducted in order to determine the impact of UV mutation at different loci on the physiological processes of DNA repair in three different strains of Schizosaccharomyces pombe, also known as fission yeast. Fission yeast has become a notable model system for it can be used to ... Read More

The Molecular Phylogenetics of Marine Turtles (555 words, 2 pages)

Phylogenetics is the study of evolutionary relationships within a group of organisms.Such relationships are revealed throughmolecular sequencinganalysis and are depicted through the use of a phylogenetic tree. The following makes use of phylogeny and specifically explores the genetic variation of four species of turtle Sternotherus odoratus, Graptemys geographica, Emydoidea blandingii, ... Read More

An Experiment to Purify, Amplify and Visualize a Plasmid (3840 words, 11 pages)

The purpose of this laboratory exercise was to purify, amplify and visualize a plasmid,which encodes the protein BsSco from Bacillus subtilis,from E. coli. To begin, the plasmid was purified using centrifugation it was then used as a template for PCR amplification. Following amplification, the plasmid and DNA from phage were ... Read More

Experiment 4: An Explanation of the Nature of the Interaction Between the Antigen and an Antibody (4149 words, 13 pages)

The purpose of experiment 4 was elucidate the nature of the interaction between an antigen (bovine serum albumin, BSA) and an antibody (IgG molecules present in the serum of rabbits exposed to BSA) this reaction was revealed using an antigen-antibody precipitation reaction by double immunodiffusion using the Ouchterlony method.In experiment ... Read More

A Study of the Replication and Repair Mechanisms of Our DNA (1437 words, 6 pages)

IntroductionMutagenic exposure may negatively alter the chemical makeup of DNA. Further replication after mutation can cause a build-up of the damage, resulting in premature cell death. It is therefore essential to understand the DNA repair mechanisms that prevent the replication of damaged DNA. Schizosaccharomyces pombe, or fission yeast, is a ... Read More

A Study on the Detection, Application to Microbiology, Analysis, and Treatment of the Salmonella Bacteria (1367 words, 7 pages)

Introduction Salmonella is a bacteria that infects intestinal tract. It consists ofa group of bacteria that leads to typhoid fever, gastroenteritis, entericfever, and food poisoning. Naturally, the bacteria are rod-shaped, gram-negative and with a cell composed of peptidoglycan. In Microbiology, gram-negative is a bacteriology term meaning a bacteria that changes ... Read More

The Lethal Venom of the Cone Snail (1120 words, 6 pages)

A creature that is not often thought to be deadly is one of the most lethal. This animal is the cone snail and there are three known types fish-hunters, worm-hunters, and mollusc-hunters(5). The most unique is the fish hunter, because this type has a remarkable way of catching and paralyzing ... Read More

The Characteristics of the Plants That Belong to the Iridaceae Family (3617 words, 14 pages)

The Iridaceae family, better known as the Iris family, is currently in the order Asparagales and in the Division Magnoliophyta. They are herbaceous monocots that can be annuals or perennials. They are known to be great ornamental plants and, like any other family, have their own set of unique characteristics. ... Read More

The Roles and Functions of Plant Cell Walls and Plasmodesmata (494 words, 2 pages)

Roles and regulation of plant cell and plasmodesmataThere are various functions that plant cell walls perform in the plant.one of the key role of the plant cell walls is to provide mechanical support to the plant. The plant cell wall acts as the skeletal framework of the plant. The secondary ... Read More

Biology Essay Examples