Free Biology Essay Examples & Writing Tips

Free Biology Essay Examples & Writing Tips

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560 samples

Don’t know what to write about in your essay on biology? Looking for good biology essay examples for inspiration? This article has all you need!

A biology essay 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. You will need to demonstrate your critical thinking skills and provide relevant evidence to support your perspective.

On this page, you will find examples of biology essays. You will also find here tips and topics prepared by our experts. They can assist you in nailing your short or extended essay.

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.

Essay on Biology: Writing Tips

Want to know how to start a biology essay? Wondering about the best way to write your essay on biology? Then check out the following tips.

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.

559 Best Essay Examples on Biology

Grass and its importance

His book titled "Omnivore's Dilemma: A Natural History of Four Meals" discusses several aspects of nature and focuses specifically on grass and what it is for animals and different people.
  • 5
  • Pages: 2
  • Words: 621

The Benefits of Animals to Humans Essay

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.
  • 3.2
  • Pages: 4
  • Words: 1166

Ubiquity of Microorganisms

However, it is unknown whether bacteria are perfectly 'ubiquitous' and whether available techniques could address the issues related to contamination, maintenance of cultures, and growth of desirous bacteria. A total of three bacteria were included [...]
  • 3
  • Pages: 7
  • Words: 2210

Pets and people

In this case, the dogs can have the aspect of love in the same manner as human beings. However, the inner calm and satisfaction that are depicted by dogs are similar to that of humans.
  • 5
  • Pages: 3
  • Words: 808

Mitosis and Meiosis in Onion Root Tip

The metaphase is characteristic of an alignment of chromosomes in a line in the middle of the cells called equator. The paired chromatids separate at the point of centromere during anaphase and move to the [...]
  • Pages: 6
  • Words: 1691

Lemon, Its Origin and Production

India is the largest producer of lemon producing about 16% of the total lemon and lemon products in the world. The Bush lemon tree is a natural and wild lemon.
  • Pages: 4
  • Words: 1115

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 [...]
  • 5
  • Pages: 4
  • Words: 1227

Cell Theory, Functions, Discoveries

The basic premises of cell theory include that the basic unit of structure in all living organisms is the cell. The other premise in cell theory is that the functionality of an organism is a [...]
  • Pages: 2
  • Words: 742

Seed Germination and Osmosis

In this experiment, "the main objective was to study the effects of salt concentration on the rate of germination in mung beans".
  • Pages: 4
  • Words: 1127

Ubiquity of Bacteria: Laboratory Activity

You will examine some surfaces and note that while you cannot see individual bacteria because they are so tiny and clear, it is possible to see a colony, or group, of bacteria. Then, the bacteria [...]
  • Pages: 6
  • Words: 1192

Psychophysics: Definition & Fundamentals

A psychophysical hypothesis, known as the theory of Signal Detectability uses a blend of statistical choice theory together with the idea of perfect observer modeling the sensitivity of the observer to events that are in [...]
  • Pages: 6
  • Words: 1606

Basic and Applied Biology: Key Differences

The applied biology objective is to use the knowledge from basic science to solve potential problems affecting quality health, and an example is the Human Genome Project.
  • Pages: 1
  • Words: 347

Biology: Analysis of Egg Experiment

The data obtained from the above experiment supports the hypothesis that if the cell is soaked in corn syrup, a hypertonic solution, then water will move out of the cell by osmosis, and the egg [...]
  • Pages: 1
  • Words: 369

The Function and Structures of the Human Heart

Pulmonary circulation involves the transfer of deoxygenated blood from the heart to the lungs and then the movement of oxygenated blood from the lungs back to the heart. Coronary circulation is responsible for replenishing the [...]
  • Pages: 2
  • Words: 488

Botany and Zoology in the Classroom

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

The Insect Effect on Human Life

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

The Chemical Composition of Food

Secondly, the liver makes most of the cholesterol in the body which is still not important and the body takes only about 50% of the cholesterol in the food eaten and the rest is eliminated [...]
  • Pages: 2
  • Words: 599

Co-Evolution: Angiosperms and Pollinating Animals

The birds need nectar from the flowers, the plants that produce nectar consequently only do so to attract these birds and insects, for the process of drawing nectar from these plants to be possible, the [...]
  • Pages: 2
  • Words: 601

Cells, Tissues, and Major Organs Systems

The report will cover the structure and functions of animal cells and organelles. It will also address the structure and functions of tissues and main organs of the body.
  • Pages: 8
  • Words: 2269

Recent Advances in Artificial Photosynthesis

Specifically, scientists strive to use the known and change them into "functional, efficient, synthetic systems that will tap the endless supply of energy coming from the sun".[1] Researchers believe that artificial photosynthesis can work on [...]
  • Pages: 5
  • Words: 1392

Shapes of Cells and Their Functions

The structure of cells in the nervous system is characterised by their elongated shape, which corresponds to the tasks performed by them.
  • Pages: 3
  • Words: 855

Strawberries History

They are the most famous and trendiest fruits in the planet. Strawberries are also used as ingredients in strawberry tiramisu which substitutes the coffee flavor for tasty and colorful strawberry effect.
  • 4
  • Pages: 10
  • Words: 1484

Living Things: What Do They Have in Common?

Nevertheless, cellular structure is a feature of all living things: from unicellular bacteria and algae to multicellular plants and animals. However, that cycle of growth and development is natural to all living organisms.
  • Pages: 4
  • Words: 856

The C-Fern Plant Laboratory Experiment

The fusion of the male and female gametes results in the formation and development of a sporophyte, which shifts to the diploid generation and the devolvement of spores.
  • Pages: 6
  • Words: 1101

Description of Mitosis and Meiosis

Mitosis is a type of cell division in which a single parent cell divides to produce two daughter cells that are genetically identical to each other and to the parent cells that divided to form [...]
  • Pages: 3
  • Words: 828

Introduction to the Nervous System

The PNS consists of the nerves that link the CNS to receptors and effectors in the body. The nerve cell The nerve cells play a critical role in the body system.
  • Pages: 2
  • Words: 539

Non-trophic Interaction in Marine Species

An example of non-trophic relationships between marine species is decorator crabs and sponges. Decorator crabs and sponges' relations are an example of mutually helpful non-trophic interaction mutualism.
  • Pages: 1
  • Words: 281

Responsible House Plant Keeping

As not every necessary chemical can be derived from sunlight and water, especially in the enclosed environment of a plant pot, it is recommended to include particular vegetation mixtures, ensuring the prosperity of the green [...]
  • Pages: 8
  • Words: 2262

Blood Cells and Their Functions

The function of red blood cells lies in carrying oxygen from the lung to the rest of the body. Such a shape allows them to increase the area of the surface, which, in turn, creates [...]
  • Pages: 2
  • Words: 567

The Integumentary and the Skeleton System

It is in the position of balance that the body is able to function successfully and in a normal state. It is the role of these hormones to control the body's operations.
  • Pages: 4
  • Words: 1100

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

Energy Balance and Expenditure

Energy density, which is typically expressed as the number of calories in a gram, is the quantity of energy or calories in a specific weight of food.
  • Pages: 1
  • Words: 304

The Characteristics and Importance of Nervous System

The nervous system is rightfully considered to be one of the most complicated and significant systems of the human body, which is responsible for the quality communication and interaction between the organs.
  • Pages: 6
  • Words: 1705

Microbiology and Its Role in Healthcare

Microbiology, as a broad scientific field, entails an array of concepts and issues that are of pivotal relevance to health care as a whole and the science of pathophysiology, in particular.
  • Pages: 1
  • Words: 296

The Effect of Acetone on Wheat Seed Germination

The experiment was carried out to study the effect of Acetone on the germination of wheat seeds. As a result, the study focused on the effect of acetone on the germination of wheat seeds.
  • Pages: 6
  • Words: 1704

The Genus Rosa’s Adaptation to the Environment

Alternative hypothesis: The abundance and distribution of stomata, storage, transport, and floral structures have a substantial influence on the adaptation of the genus Rosa to its environment.
  • Pages: 4
  • Words: 1144

The Histopathology Laboratory: Special Stains

The Masson's trichrome is commonly used to reveal the architecture of tissues and in the preparation of frozen sections. The Masson's trichrome stain was used in the staining of normal uterus and the uterus fibroid.
  • Pages: 8
  • Words: 2077

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

Cell Membrane Permeability

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

Anatomy of Neuron and Neuroplasticity

Neuroplasticity, also known as neural plasticity or brain plasticity, is a process in which the brain undergoes adaptive structural and functional changes.
  • Pages: 2
  • Words: 576

Planting Bamboo: The Role of Photosynthesis

Lastly, I think bamboo's photosynthetic exceptionalism is manifested in the fact that light is one of the most important factors of photosynthesis, as it is a source of the necessary radiant energy for biochemical processes.
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  • Pages: 3
  • Words: 825

Homeostasis and Regulation in the Human Body

The feedback loop essential components include the receptor, also known as a sensor, which detects changes in the body Remember that homeostasis is the ability of the body to maintain stable and balanced internal conditions.
  • Pages: 3
  • Words: 827

Yeast and the Fermentation Process

An example is a cellular fermentation, a pathway of breaking down sugars in the absence of oxygen. Yeast is one of the organisms that perform this procedure in the presence of a substrate to produce [...]
  • Pages: 1
  • Words: 343

Micrococcus Luteus Detection Experiment

Microbial Physiology, the branch of microbiology responsible for the study of these enzymes, employs a spectrum of tests that detect the known set of enzymes unique to each species of microbe.
  • Pages: 2
  • Words: 401

Introduction to Microbiology: Escherichia Coli

This type of E.coli is included in a class of dangerous E.coli, called enterohemorrhagic.E.coli O157:H7 was discovered in 1982, during a severe outbreak of bloody diarrhea, associated with the consumption of contaminated hamburgers. The hemolytic [...]
  • Pages: 8
  • Words: 2465

Vertical Stratification

Due to the differences in the terrestrial and aquatic environments, numerous contrasts between the two environments can be observed. Another major difference between the terrestrial and aquatic ecosystem is their level and ability to support [...]
  • Pages: 2
  • Words: 604

The Age and Growth of Cod (Gadus Morhua)

The Atlantic Cod occurs throughout the colder and the deeper regions of the Northern Atlantic, starting from Greenland to North Carolina and Scandinavia.
  • Pages: 12
  • Words: 3373

“Regenesis” by George Church and Edward Regis

The ability to control living things has triggered a biotechnological revolution, which is only comparable to the changes that are witnessed in the information and communication technology.
  • Pages: 5
  • Words: 1377

Analysis of the Brine Shrimp

The Brine shrimp, which is also known as the Sea monkey, has been used in the modern world as food for fish and is of high quality because it can be grown using the aquaculture [...]
  • Pages: 3
  • Words: 811

Evidence for Biological Evolution

The interconnection between life and evolution remained a mystery until the radiance named Charles Darwin illuminated the scientific world with a novel piece of work titled "On the Origin of the Species using Natural Selection [...]
  • Pages: 2
  • Words: 563

Origin and Evolution of Segmentation

In the article, "Origin and Evolution of Segmentation", the first hypothesis supports the independent segmentation in annelids, arthropods, and chordates. The first hypothesis predicts negligible similarities in the segmentation patterns of arthropods, chordates, and annelids.
  • Pages: 2
  • Words: 562

OECD-GLP Guidelines: Toxicological Tests

During and after the duration of exposure, the observational studies, biochemical analyses, hematological tests, and histological studies that were conducted on the rats show that the biological responses in the rats did not differ significantly [...]
  • Pages: 7
  • Words: 2275

T Cells: Definition and Functions

The na ve T cells in the secondary lymphoid; when they encounter an antigen presented on MHC of dendritic cells, they differentiate and proliferate into effector T cells, CD8 or CD4 T cells depending on [...]
  • Pages: 3
  • Words: 1002

Human Circulatory System and Evolution

The coronary circulation involves the movement of blood through the tissues of the heart while the systemic circulation involves taking blood to all the rest of the body tissues and back to the heart".
  • Pages: 2
  • Words: 534

Cloning of Plants at the Botanic Garden

Cloning is now considered to be an efficient means to grow plants in being the result of vegetative propagation while seeds are the result of the natural reproductive phenomenon of plants.
  • Pages: 2
  • Words: 580

Different Ecosystems and Living Things

Habitat is the living environment; the population is all the living organisms within a habitat, and community is the organisms that interact with each other. The descriptions of the three ecosystems below will focus on [...]
  • Pages: 3
  • Words: 809

Vitamin A: Description and Usage

Vitamin A found in fruits and vegetable is referred to as Provitamin A carotenoids, these vitamins A are converted into retinol in the body where one molecule of beta carotene produces two molecule of Vitamin [...]
  • Pages: 2
  • Words: 509

Browning Reactions Explained

It is the reaction of free amino groups like amines, amino acids, peptides and proteins with reducing sugars in the presence of heat and during storage.
  • Pages: 2
  • Words: 522

A Peptic Ulcer: Medical Analysis

It occurs as a result of distorting in the acidic environment of the stomach when the wall lining of the stomach or duodenum erodes due to an increase in gastric acid; this triggers the development [...]
  • Pages: 4
  • Words: 1185

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

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

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

Cane Toad: Introduction and Threat

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 [...]
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  • Pages: 8
  • Words: 1018

Telescope and Microscope Discovery Combo

The paper will look into the history of the discoveries and their effects in the development of the human well beings as well as the enhancement of the human understanding of the surrounding nature in [...]
  • Pages: 7
  • Words: 1932

Geelong Botanic Garden’s Ecosystem

Evidently, the species curve shows that the species of plants in the Geelong botanic garden increases with the increase in the area of the quadrat.
  • Pages: 11
  • Words: 2829

Melanin Theory as a Pseudoscientific Claim

The architects of this theory believe that white people are mutants and that whiter skin is a form of albinism with the likes of Wade Nobles opining that "Blacks are fully human because of their [...]
  • 5
  • Pages: 9
  • Words: 1645

Evolution of Predator and Prey Pairings

Given the fact that prey and predator pairings threatens the survival of the prey there are other external factors that contribute to the elimination of the prey species.
  • 5
  • Pages: 2
  • Words: 580

Earth Atmospheric Evolution

It is believed that the different geological evolutions of the earth and the atmosphere have come up with very new species of animals following a transformation of the then existing animals, as well as extinction [...]
  • Pages: 6
  • Words: 1719

Measurement of Generation Time of E. Coli

An integral part of bacterial cultures is the generation time, which determines the ability to double during each time interval: determining the minimum value of this time for an inoculated E.coli culture was the main [...]
  • Pages: 5
  • Words: 1527

A Light Microscope: Function and Usage

In the optical microscope device, a beam of light hits a specimen located on a slide and then travels through a system of mirrors into the objective. The use of optical circuits inside the eyepiece [...]
  • Pages: 2
  • Words: 366

The Thermoregulation Is and Its Importance

The importance of thermoregulation in the body includes: In case there are changes in the external temperatures, an organism must maintain a constant temperature of about 37 degrees Celsius for a human body to ensure [...]
  • Pages: 1
  • Words: 367

Nervous System: The Main Functions

The Nervous System is the "command and control center of the body". These electrical impulses go between the brain, the skin, the organs, the glands, and the muscles.
  • Pages: 2
  • Words: 577

Microbial Growth and Effect of pH on It

The above principle is used in this laboratory work, the aim of which is to evaluate the effect of the pH of the medium on the growth of microorganisms.
  • Pages: 5
  • Words: 1137

Understanding the Hand Anatomy

The excellent functionality of the different parts of the body, including the hand, thigh, neck, girdle, pectoral, and legs, are critical for the normal functioning of a human being.
  • Pages: 4
  • Words: 1226

Measuring the Salt Tolerance of Plants

The variety of crops grown and the need for agricultural measures for soil moisture and irrigation depend on the arable land belonging to a particular category.
  • Pages: 8
  • Words: 2504

Cell Counting and Measurement Under Magnification

The aim of this exercise is in the measurement and recording of the size of cells and tissues. Insert the eyepiece graticule into the eyepiece and then reattach the base of the eyepiece to the [...]
  • Pages: 5
  • Words: 1641

Archaea and Bacteria Prokaryotes Dichotomous Keys

Most members of this phylum which are pathogenic to humans are obligate pathogens that are mostly intracellular. They are divided depending on the mode of respiration, fermentation rate, temperatures in which they thrive and shape.
  • Pages: 2
  • Words: 327

Botany: The Beavertail Cactus

Phylum Angiospermae is known to dominate the land because it consists of the highest number of species in the kingdom Plantae. Beavertail cactus exhibits several structural modifications in the leaves, stems, roots and flowers.
  • Pages: 2
  • Words: 568
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