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Free Biology Essay Examples & Topics

Free Biology Essay Examples & Topics

At one point in your academic career, you have to learn how to write an essay. It is an effective and fast way to evaluate students’ ideas, understanding of the subject, and fluency of their scientific writing. Most instructors will use this method even if you study precise sciences such as physics, math, and biology. Here, we consider the latter in detail.

A biology essay, in a nutshell, is a type of academic paper that focuses on a particular topic of biology. It can discuss animal life, cycles in biology, or a botanic subject. Similarly to any academic essay, you are expected to demonstrate your critical thinking skills. You’ll have to provide relevant evidence to support your perspective.

On this page, you will encounter biology essay examples. They can assist you in nailing down a similar school or college assignment. Yet, first of all, look at our tips prepared by our experts.

Areas of Research for Biology Essays

If you’ve been assigned to write a biology essay, you probably know which area of research you have to choose. However, it might be beneficial to explore other available scopes. It’s useful for both interdisciplinary study and the cases when you are free to pick your area of research. In this section, let’s figure out what you can study in biology.

Here are biological areas of research you should be familiar with:

  1. Cancer Biology studies this type of disease to prevent, detect, diagnose and cure it. The ultimate goal of such biologists is to eliminate cancer.
  2. Cell Biology is a branch that studies the structure, function, and behavior of cells. Here, biologists study healthy and sick cells to produce vaccines, medication, etc.
  3. Biochemistry is an application of chemistry to the study of biological processes on cell and molecular levels. It is a cross-discipline between chemistry and biology. The focus is on the chemical processes of living organisms.
  4. Computation Biology is a study of biological data that develops algorithms and models to understand biological systems. Here, scientists either work for institutions or research for private enterprises.
  5. Genetics is an area that focuses on the study of genes and genetic variations for health benefits. It looks at the way DNA affects certain diseases.
  6. Human Disease is an area within which scientists study different diseases. The field covers cancer, developmental disorders, disease genes, etc.
  7. Immunology is a branch of biology that focuses on immunity. Immunologists look at the way the body responds to viruses as a way to protect the organism.
  8. Microbiology studies all living organisms that are too small for our eye to see. It includes bacteria, viruses, fungi, and other microorganisms.
  9. Neurobiology is the study of the nervous system. Biologists examine the way the brain works and look into brain illnesses.
  10. Stem Cell and Developmental Biology seeks to examine how the processes behind stem cell’s ability transform cells. The biologists in this area use the power of stem cells to model human illnesses.

Tips on Writing a Biology Essay

To write a good biology essay, first, you need to examine the topic well. Then, work out a structured outline to approach it. Sounds familiar? An essay about biology resembles any standard 5-paragraph paper. However, several aspects will be different.

When you’re writing about biology, pay attention to the following features:

  • Introduction. Just as in any other form of academic writing, the first section of your paper introduces the subject. Here, explain why your ideas are relevant to biology as a science.
  • Thesis Statement. The final one or two sentences of the first paragraph should include your original hypothesis and experiment. You will be proving them in the main body. You do not have to include the results as the reader will encounter them later. If you’re struggling with this part, try our thesis generator.
  • Main Body. In this part, write about all the experiments in detail. Often, teachers require to include visual aid to prove your point. For Zoology, Anatomy, Botany, it is pretty easy to find some photos and illustrations.
  • Conclusion. Here, restate your thesis. Reemphasize the most critical aspects described in the main body. You can do it by using our summarizing tool. The goal of this last paragraph is to leave an everlasting impression on the reader.

Thank you for reading our article. We hope you found it helpful. Share it with your class peers who also study biology. Additionally, have a look at the biological essay examples below.

151 Best Essay Examples on Biology

Stem Cells Biology: Features and Researchs

Stem cells are cells that have the capacity to subdivide into other cells. The second property of stem cells is that they can develop into specialized cells in the differentiation process.
  • Pages: 5
  • Words: 1492

Pfiesteria Piscicida: Classification and Analysis

Pfiesteria piscicida is a single-cell, a microscopic organism found in the environment for millions of years. 8S regions agree to the placement of Pfiesteria in the Peridiniales or a group between the Peridiniales and the [...]
  • Pages: 7
  • Words: 1704

The Importance of Mitochondria and Their Purpose

This involves a furrowing of the inner and then the outer membrane as if someone was pinching the mitochondria. Of course, the mitochondria must first multiply itself several times as their DNA.
  • Pages: 2
  • Words: 676

Prions as Novel Infectious Agent

The most common TSE diseases include the Mad Cow Disease in cattle, Scrapie in sheep, and Chronic Wasting Disease in deer, elk, and moose."Different regions of the brain are affected by different prions".
  • Pages: 5
  • Words: 1435

No to Cloning for Medical Research

Those who do not subscribe to cloning for biomedical research believe that the embryo is in fact "one of us"; a human life in process an equal member of the species "Homo Sapiens" in the [...]
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  • Words: 1452

Discussion of Cuttlefish: Is It a Fish?

While it appears to swim with the aid of delicate-looking fins that line its sides much like the fish uses its fins top and bottom to help propel it through the water, the cuttlefish has [...]
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  • Words: 522

Infectious Bacterial Identification From DNA Sequencing

The first is the preparation of the DNA sequence and matching it with the database of known DNA sequences. Given below is a screenshot of the process PCR Amplification: To prepare the polymerase chain reaction, [...]
  • Pages: 2
  • Words: 1030

Mountain Pine Beetles Review

The trees attack begin with the injured trees, trees with in poor site, infected trees in the roots or stem, fire damaged trees, overcrowded trees and the very old trees during the first stage of [...]
  • Pages: 10
  • Words: 2394

Drug Delivery. Simulated Intestinal Fluids Development

As the use of physiological conditions in Caco-2 cell transport studies affects the transport of compounds, the general purpose of the research "was to identify a simulated intestinal fluid containing physiological relevant surfactants and nutrients [...]
  • Pages: 8
  • Words: 2244

Corn Kernel Color Genetics

The report provides a study done for the trait of corn color for a monohybrid cross of two breeds of corn plants. The paper has examined the distribution of the dominant and recessive color of [...]
  • Pages: 2
  • Words: 485

Growing Mold Recommendations

As for the fourth piece of bread, I put half of it in the dark warm place, on the top of the fridge in a paper bag, and the other half I put in the [...]
  • Pages: 2
  • Words: 593

Sexual Selection Theory by Charles Darwin

The study was able to establish that accessory gland size exhibited positive allometry and males with larger accessory glands were more likely to copulate suggesting that larger size in this trait is favored by sexual [...]
  • Pages: 4
  • Words: 1307

Cardiovascular Physiology. The Heart

The heart is situated in the middle of the thorax with the largest part of the heart slightly offset to the left but for dextrocardia, it is on the right.
  • Pages: 4
  • Words: 1540

Origins of Plant Growth

The purpose of this paper was to determine the origins of plant growth and ascertain the role of light in the growth and development of plants.
  • Pages: 4
  • Words: 1211

B12 Vitamin: Risks and Benefits

Vitamin B12, also known as cobalamin, is a water-soluble vitamin that contributes to blood cell formation, the work of the nervous system, and metabolism.
  • Pages: 2
  • Words: 616

Phagocytosis Mechanism in Higher Animals

The phagocytosis process can only occur after the phagocyte binds to the receptors on the surface of the bacteria. If the phagocyte is not compatible with the available receptors, blood proteins, which are called opsonins, [...]
  • Pages: 3
  • Words: 868

The Digestive System and Its Functions

That is why the proper functioning of the human digestive system serves as the basis for full-fledged life support during the main processes in the digestive tract. In the oral cavity, food enters the throat, [...]
  • Pages: 3
  • Words: 952

Red Blood Cells: Debunking Health Myths

When the kidneys detect a decrease in the level of oxygen under circulation through the blood, they produce a hormone known as erythropoietin, which in turn activates the differentiation of various precursor cells for RBCs. [...]
  • Pages: 2
  • Words: 605

Microbial Biotechnology and Pharmaceutical Impact

Microbes have a vital role in the pharmaceutical industry, being used in the production of antibiotics, probiotics, vaccines, and quality tests to prevent microbial contamination of the medicine developed.
  • Pages: 1
  • Words: 312

Eukaryotic and Prokaryotic Cells: Key Differences

Furthermore, upon the analysis of the differences between eukaryotic and prokaryotic cells, one can develop a proper understanding of the environment that is required for the correct functioning of eukaryotic and prokaryotic cells.
  • Pages: 3
  • Words: 848

Bacteria and Their Positive and Negative Effects

However, the described assumption is quite far from the truth, with a significant number of bacteria being not only useful but also essential to the functioning of the human body and the sustenance of life.
  • Pages: 1
  • Words: 335

Glycolysis Process and Regulation

Glycolysis is the first step in cellular respiration, and it is an anaerobic process that takes place outside of mitochondria. In this step, the phosphate group is detached and taken in by ADP, turning it [...]
  • Pages: 1
  • Words: 295

Geospiza Finches as a Form of Natural Selection

Researching the hybrid offspring of two different Geospiza species may allow delineating some of the existing trends in evolution and speciation, as well as clarifying the views of prominent contributors to evolutionary theory.
  • Pages: 1
  • Words: 299

Life Science Rationale

What are the Purposes of the Botany and Zoology Areas in the Classroom? The role of a teacher is to prepare botany and zoology areas.
  • Pages: 7
  • Words: 1631

Allelopathy in Helianthus Annuus’ Germination

These effects were attributed to the role of gibberellins as allelochemicals in the germination of sunflower seeds. A total of 36 seeds were allocated to the control and treatment groups.
  • Pages: 6
  • Words: 1705

Plant Growth and Development with Music

The study by Kroeze is focused on the ability of plants to listen to music. The article by Landhuis is dedicated to the ability of plants to hear danger that comes in the form of [...]
  • Pages: 3
  • Words: 665

Seed Germination Experiment: Results and Discussion

The results indicated that the number of germinated seeds differed according to the concentration of solutions. 0625M CaCl2 germinated quickly on the second day and attained the mean of about 10 germinated seeds on [...]
  • Pages: 4
  • Words: 967

Reproductive Isolation and Its Potential Effects

Reproductive isolation pertains to the fact that in case a population of the same species is separated into two parts and they are not able to breed with one another, genetic makeup will change according [...]
  • Pages: 2
  • Words: 281

Marine Algae Associated Bacteria as Antioxidants

The antinociceptive activity analysis involved comparing the reaction time of mice treated with the extracts and the controls. The authors conclude that the isolation and characterization of the bioactive principles from the potent strains could [...]
  • Pages: 4
  • Words: 1188

Glowing in Animals’ Eyes

It reflects a portion of the light entering the eye after it is cast on the retina, which is the area where the image of what is before an animal is constructed to be further [...]
  • Pages: 2
  • Words: 287

Vegetation Monitoring From Space

Remote sensing also helps in the determination of the distribution of the existing vegetation cover within a particular locality. In this paper, the author seeks to provide an overview of the use of remote sensing [...]
  • Pages: 22
  • Words: 6072

Microbiologist as a Career in Bioscience

Moreover, I believe that in this way I can help people by making discoveries that can be used in medicine, agriculture, food production. This experience can help me in the future especially when I will [...]
  • Pages: 2
  • Words: 552

Reverse Mutation Concept in Cancer Biology

The hybridization of phage and the Alu probe will point to the presence of the human mutagen in the cell. Particularly, the application of the KIF2C protein will have to be considered to identify the [...]
  • Pages: 2
  • Words: 572

Escherichia Coli and Salmonella Typhimurium Bacterias

Therefore, the objective of the study was to determine the invasive and adherence abilities of S.typhimurium relative to E.coli. In the comparative study of invasiveness and adherence of E.coli and S.typhimurium, the study used INT407 [...]
  • Pages: 2
  • Words: 581

Environmental Management: Ice Storm and Beetle Outbreaks

Thus, in their article, "The Effects of a Large-Scale Ice Storm Event on the Drivers of Bark Beetle Outbreaks and Associated Management Practices," Groot, Ogris, and Kobler aim to research the patterns of insect outbreaks [...]
  • Pages: 2
  • Words: 552

Providencia Rettgeri as an Unknown Microorganism

The common laboratory techniques employed in the identification of bacteria are the morphology of colonies and cells, biochemical reactions, physiological mechanisms, and genetic characteristics.
  • Pages: 7
  • Words: 2203

Respiratory Tract Infections Under Investigations

RTIs are prevalent among the elderly due to the existence of chronic conditions and deterioration of health. Acute sinusitis and bronchitis are some of the most common cases of RTIs that contribute to the abuse [...]
  • Pages: 9
  • Words: 2524

Proteomic Analysis Technique

The objective of the study was to compare the nature of proteins in egg yolks of chicken, duck, and quail, which are three common species of poultry.
  • Pages: 5
  • Words: 1403

Antimicrobial Resistance in Helicobacter Pylori

Therefore, the aim of the essay is to examine the problem of resistance in H.pylori and describes its mechanisms. Thus, the analysis of resistance in H.pylori shows that the determination of the individual, local, and [...]
  • Pages: 5
  • Words: 1433

Gekkonidae: Biological Characteristics

A comprehensive description of the family peculiarities started with the analysis of general characteristics of lizards and the features they obtained throughout the evolution.
  • Pages: 4
  • Words: 1121

Soil Impact on the Growth of Plants

The aim of this experiment was to determine the impact of various types of soil as well as the effect of an energy drink on plant growth. The growth of the plants was measured as [...]
  • Pages: 4
  • Words: 1227

Multiplex Point-of-Care Diagnostic Platform Development

Greening is among the major threats which can negatively impact the citrus industry through decreasing product quality and quantity and thus increasing their price due to the necessity to plan time- and cost-consuming strategies to [...]
  • Pages: 7
  • Words: 2055

DNA in Action: Sockeye Salmon Fisheries Management

The researchers in the article carried out an analysis entailing a total sum of 9300 salmon fish species. The latter was followed by mixed stock samples in the lower region of Fraser River and test [...]
  • Pages: 2
  • Words: 355

Cellular Fluid and Regulatory Mechanisms

This paper describes the components of a cellular fluid and regulatory mechanisms for achieving electrolyte balance in the ICF and ECF. The ICF comprises the fluid within the cells, and it is the primary constituent [...]
  • Pages: 4
  • Words: 1166

Fertility Issues and Sexual Positions

Even if a woman is menstruating, which is indicative of their potential to get pregnant, abnormal hormone levels within a woman's body can cause issues when it comes to the density of the uterine wall [...]
  • Pages: 2
  • Words: 506

Microbiology Lab: Helminths

The purpose of this experiment is to observe the characteristics of eukaryotic pathogens, including protozoa, fungi and helminthes; to be able to distinguish between different organisms, and apply the results in the field of microbiology. [...]
  • Pages: 4
  • Words: 1221

Fungi: Characteristics and Groups

Chytridiomycota is a division of the kingdom Fungi. This class is often called higher fungi because of their complicated structure and other unique characteristics that differ them from other representatives of the kingdom.
  • Pages: 2
  • Words: 598

Dutch Elm Disease, Its Symptoms and Prevention

The spreading of the produced hyphae enhances the tree to produce plugs that play a significant role in cutting off the xylem vessels which are responsible for movement of water within the plant."The cutting of [...]
  • Pages: 3
  • Words: 855

Biodiversity, Its Evolutionary and Genetic Reasons

The occurrence of natural selection is hinged on the hypothesis that offspring inherit their characteristics from their parents in the form of genes and that members of any particular population must have some inconsiderable disparity [...]
  • Pages: 2
  • Words: 578

Plant Cell Physiology and Its Processes

Cell physiology is the study of the functions of the cell structures. The function of controlling movement of substances in and out of the cell is known as the physiological process.
  • Pages: 2
  • Words: 610

Male Mating Success and Courtship Modalities

For this reason, this review focuses on the provision of more insights on the subject of sex and evolution with a specific focus on the explanation of female preference for multi-modal courtship and why the [...]
  • Pages: 10
  • Words: 2812

Visual Mechanism and Control in Humans and Animals

To appreciate the historical context of the publication of the article by Goodlade and Milner, it is prudent to discuss what was happening before and in the early 1990s in the field of visual perception.
  • Pages: 7
  • Words: 1987

Lab Report: Caenorhabditis Elegans

Studies involving the manipulation of the unc-22 gene including the introduction of mutations and silencing various alleles of the gene have helped elucidate the structure and function of the gene, which is beneficial to the [...]
  • Pages: 6
  • Words: 1507

Brain-to-Brain Interface Experiment

It can be argued that the brain-to-brain interface experiment described in the study was a sophisticated variant of the knee jerk reflex.
  • Pages: 6
  • Words: 1696

Marine Life in United Arab Emirates

This report analyses the marine life in the UAE, covering detailed information about the various species of animals found in the region and their adaptation to the unique environment.
  • Pages: 5
  • Words: 1474

Philip Henry Gosse’s Biography and Contribution

He went to school in Poole where he was able to gain a lot of experiences and skills. Henry Gosse delivered a clear message to his people concerning flora and fauna that existed in the [...]
  • Pages: 11
  • Words: 3017

Biomimicry’ Process and Importance

Biomimicry arefers to the process of imitating the products and processes of nature'. Scientists have also used nature to solve the problem of energy.
  • Pages: 4
  • Words: 1171

Pollutants Effects on Cellular Respiration Rate

Therefore, the purpose of the experiment was to investigate the effects of pollutants on the cellular respiration rate. Moreover, the hypothesis that the presence of a pollutant harms the rate of respiration was investigated by [...]
  • Pages: 5
  • Words: 1434

Myths about the Brain Functionality

The brain is one of the most fascinating organs of the human body. In conclusion, the beliefs about ten percent of our brain left and right-brained people or other similar statements are pure myths that [...]
  • Pages: 2
  • Words: 557

Natural Sciences: Insects

The number of insects in the world exceeds the number of all the other species taken together. This way, the reduction of the number of pollinating insects will lead to the decline of productivity of [...]
  • Pages: 2
  • Words: 571

Animals Importance for Human Beings

The following are some of the reasons that make animals matter to human beings. The other significance of animals to human beings is that they are a source of food.
  • Pages: 4
  • Words: 1088

Biochemical Cycles

Carbon is also an important element for the living organisms; hence the carbon cycle which is a gaseous cycle takes place to recycle the carbon and make it available for the living organisms.
  • Pages: 2
  • Words: 616

Biodiversity Issues

Genetic diversity is a term used to refer to the dissimilitude of organisms of the same species. Species diversity is used to refer to dissimilitude of organisms in a given region.
  • Pages: 2
  • Words: 563

Bio Diversity and Future of Our World

For the resources of the world to be maintained, biodiversity has to be present. It is upon ourselves to determine the kind of a world we want to live in.
  • Pages: 5
  • Words: 1405

Drug Mescaline Peyote

Peyote is believed to cause some people to hallucinate and in deed the Native American church used it while meditating. In conclusion, the use of peyote is illegal in U.S.because this plant has similar effects [...]
  • Pages: 2
  • Words: 618

The Diffusion of a Cell

The study achieved this goal through the use of Single Particle Tracking that entails observing the diffusion of a particle in the cell.
  • Pages: 3
  • Words: 855

Genetic experimentation and development

In fact, the proponents of cloning assert that it would provide the parents with the opportunity of determining the attributes as well as the genetic features of the offspring.
  • Pages: 5
  • Words: 1454

A Study of “Escherichia Coli”

The division of bacterial cells is focused on the study of the force that makes the cell separate into two, paying specific attention to FtsZ and the division ring Z-ring.
  • Pages: 2
  • Words: 515

Cell Membranes

When cells are contained in solutes with a majority of big molecules, the rate of permeability in cell membranes will automatically decrease.
  • Pages: 3
  • Words: 842

The Cane Toad

The cane toad multiplied rapidly in a short span of time compared to other species in the same habitat. The major reason for introduction of the cane toad was to control the French Cane Beetle [...]
  • Pages: 8
  • Words: 1018

Karyotype results

The severity of potential malformations to the foetus is another important factor as it would determine the survival rates of the foetus.
  • Pages: 4
  • Words: 1096
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