Free Biology Essay Examples & Writing Tips

Free Biology Essay Examples & Writing Tips

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538 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.

538 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

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

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

Aspects, Importance and Issues of Biodiversity

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

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

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

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

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

Importance of the Brain in Human Body

The brain also provides a long-term storage memory where a reader may be in a position to recall the events that have taken place in the comprehension and the right order.
  • Pages: 3
  • Words: 946

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

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

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 Digestive System in the Human Body

The stomach is an organ of digestion located between the esophagus and the duodenum on the left upper part of the abdominal cavity. The large intestines of the human body are located between the ileocecal [...]
  • Pages: 2
  • Words: 613

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

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

Ethnobotanical Uses of Plants

For example, the Cedarwood plant native to Asia and the Americas is used topically in the treatment of skin diseases such as warts and psoriasis.
  • Pages: 7
  • Words: 1938

A Lab Report for Microbiology Class

The main advantage of this microbiological method is the different concentrations of nutrients and oxygen at different levels of the depth of the beaker: this allows bacteria with different aerotolerant needs to grow.
  • Pages: 2
  • Words: 576

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

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

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

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

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

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

A Brief Discussion of Animal and Plant Cells

In plants, important cells such as the parenchyma cells help to store materials and support the process of photosynthesis. Cells found in the leaves of most plants fundamentally assist the plant to absorb the necessary [...]
  • Pages: 2
  • Words: 654

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 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

Bacteria Identification: Enterobacter Aerogenes

However, it is sensitive to most of the antibiotics specific to the bacterium although the sensitivity is easily lost due to its unique mechanism for resisting antibiotics particularly through the production of lactamase enzyme.
  • Pages: 4
  • Words: 1096

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

Forensic Procedures: Hairs and Fibres

The continued cases of robbery, murder and rape have been countered with the adoption of various forensic procedures to bring the crime perpetrators to book. The collection of hairs and fibres is usually the first [...]
  • Pages: 7
  • Words: 2067

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

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

Transpiration Process in Plants

Initially, the roots absorb water by the process of osmosis due to the variation in the concentration of the water level between the soil and roots.
  • 3.3
  • Pages: 2
  • Words: 562

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

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

Wildlife Management and Extinction Prevention in Australia

This paper investigates the threats to wildlife in Australia and strategies for managing and preventing their extinction. In summary, this paper examines the threats to wildlife in Australia and outlines strategies for managing and preventing [...]
  • Pages: 10
  • Words: 2902

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

Characteristics of Adult Development

The development entails the changes that are experienced at the various levels of growth from childhood to adulthood. Another influence is the socioeconomic status of an individual.
  • Pages: 4
  • Words: 1311

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

Essentials of Biodiversity

At the same time, the knowledge and a more informed understanding of the whole concept of biodiversity gives us the power to intervene in the event that we are faced by the loss of biodiversity, [...]
  • Pages: 7
  • Words: 1846

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.
  • 5
  • Pages: 3
  • Words: 825

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

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

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

Viruses: Alive or Not From Scientific Perspective

However, according to Bhella, no organisms can be entirely independent of the environment, and life at its core is interdependent. The fact that viruses evolved with other creatures is enough to state that they are [...]
  • Pages: 1
  • Words: 352

Falling in Love as Part of Natural Selection

Further, the science of love exhibits to us that falling in love is in fact ingrained in our physiological makeup and as a natural component of our being, we cannot help to fall in love [...]
  • Pages: 4
  • Words: 1085

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

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

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

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 [...]
  • 4
  • Pages: 8
  • Words: 1018

Concept of Bioethics in Society

The classical assumption in the discipline of bioethics is that the field is concerned with the dilemma of determining the most ethically appropriate action in the healthcare setting.
  • Pages: 10
  • Words: 2735

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

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 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

A Statistical Experiment: Junco Birds

The presence and content of 2-pentadecanone in the male may be related to the saturation of particular odors that excite the reproductive call of female birds.
  • Pages: 2
  • Words: 596

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

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

Inhibiting Grass Growth by Salt

The practice results in an increase in concentration of salt in the soil and/or accumulation of salt on the foliage. Road salt inhibits the growth of grass.
  • Pages: 2
  • Words: 591

Environmental Microbiology Overview

When managed properly in accordance with the five principles of good management, they provide a number of benefits that include: Detoxification of wastewater Capturing renewable resources such as energy and water Sensing pathogens in the [...]
  • Pages: 12
  • Words: 3298

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

Biology. Cell Analogy – Nucleus + Nucleolus

The DNA is similar in every cell of the body, but depending on the specific cell type, some genes may be turned on or off - that's why a liver cell is different from a [...]
  • Pages: 1
  • Words: 557

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

Methods of Finding and Identifying Dinosaur Fossils

The fossil record reveals that birds are the modern and feathered version of dinosaurs that evolved from past theropods in the Late Jurassic age. The reason for this is to ensure that fossil particulars weathering [...]
  • Pages: 10
  • Words: 2816

Evolutionary Changes of Animals and Plants

This presentation will show how animals and plants evolved with time passing. It is critical to examine the factors that underlie these processes and their outcomes.
  • Pages: 12
  • Words: 869

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

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

Aspects of Biology as a Subject

Understanding the causes of disease variations and using the information to improve the health of the population will be my main benefits I will offer to the society.
  • Pages: 2
  • Words: 694

The Characteristics and Importance of Chickpeas

This demonstrates the popularity of chickpea and its application in various areas of the economy. The popularity of chickpea has grown significantly, and this has led to its demand in different parts of the world.
  • Pages: 13
  • Words: 3665

Invertase Enzyme: Description and Role

One of the crucial enzymes in the food industry is external invertase from Saccharomyces cerevisiae. The key functional state of the external invertase is a homodymer with a molecular mass of 270 kDa.
  • Pages: 4
  • Words: 1151

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
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