Free Biology Essay Examples & Writing Tips

Free Biology Essay Examples & Writing Tips

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568 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.

568 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

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

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

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

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

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

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

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

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

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

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

Physiology of Uromastyx Aegyptia

Since the soil in the harsh and arid regions is salty, this makes the vegetation to have a lot of salt elements in them.
  • Pages: 4
  • Words: 1340

Sex Determination in Amphibians

Precisely, the dissimilarity between the sex chromosomes entails the sizes of the chromosomes, the patterns of binding, the centrometric index, the heterochromatin characterization as well as the transcription loops of lampbrush chromosomes.
  • Pages: 3
  • Words: 908

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 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

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

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

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

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

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

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

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

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

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

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

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

The Psychological Nature of Memory

Using the numerical representation of the participants' results, the researchers calculated the dependence of the memory and theory of mind in the process of recalling the interlocutors.
  • Pages: 4
  • Words: 1223

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

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

“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

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

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

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

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

Physiological Differences Between Males and Females

Although the males have bigger muscles than the females, the latter have better blood flow during exercise, and use one hundred percent of the fibers in their muscles as compared to the former who use [...]
  • Pages: 2
  • Words: 557

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

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

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

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

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

Bacterial Identification Through Biochemical Testing

The laboratory tests allow for the identification of the difference between gram-positive and -negative bacteria in practice. The samples were used to determine the bacteria and their type based on the results of the tests.
  • Pages: 9
  • Words: 2395

Streptococcus Pyogenes Overview

Streptococcus pyogenes, a beta-hemolytic bacteria, is officially a member of the Streptococcaceae family, which is regarded as the most harmful member of the entire genus due to the vast range of illnesses associated with it.
  • Pages: 3
  • Words: 925

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 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

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

Microbiological Analysis: Lab Report

This type of medium is standardly used to isolate Gram-negative bacteria, with a source of nutrients in the form of carbon and nitrogen from the casein hydrolysate that is part of the C-CNA.
  • Pages: 1
  • Words: 520

The Role of Microorganisms, Biotechnology

Today, the field of their use in human life is so vast and diverse that it makes an invaluable contribution to the development of such industries as health, industry, and the functioning of the environment.
  • Pages: 1
  • Words: 391

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

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

Male Reproductive System and Anatomical Structures

Male and female reproductive systems have several similarities including the fact that most of the reproductive organs are developed from similar embryonic tissue that make these organs homologous. In male and female reproductive systems, [...]
  • Pages: 4
  • Words: 908

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

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.
  • 1
  • Pages: 2
  • Words: 694

Biosphere: Sydney in Australia

Due to the rapid growth in the population and the rate of industrialisation in Sydney there has been an imbalance between the green spaces and the building open spaces.
  • Pages: 5
  • Words: 1508

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

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

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

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

Common 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

History Of Biotechnology

In the course of the First World War, the processes of fermentation were set up in order to carry out production of acetone from the solvents of paints as well as starch to be used [...]
  • Pages: 7
  • Words: 1908

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

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

Extracellular Enzyme Production Tests

Microbes produce exoenzymes to metabolize substances in their surroundings, and these microorganisms may be used in biochemistry assays to evaluate the presence and activity of exoenzymes.
  • Pages: 6
  • Words: 1178

Operant and Respondent Conditioning

In respondent conditioning, the stimulus-response dynamic is unidirectional: the US, often not controlled by the organism, elicits a response, but the organism cannot produce a subsequent stimulus since responding does not affect the presentation of [...]
  • Pages: 3
  • Words: 953

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

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

Evolutionary Biology and Darwin

The lack of knowledge about the laws of heredity, the genetic and ecological structure of species, and the lack of experimental evidence of natural selection served as the basis for the growth of critical attitudes [...]
  • Pages: 5
  • Words: 1406

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
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