Biology Essays Examples For College & High School Students in PDF

10822 total results

A Study on the Reproductive Structures and Characteristics of Liveworts, Mosses, and Hornworts (1306 words, 7 pages)

AbstractThere are three divisions of bryophytes which include liverworts, mosses, and hornworts. These non-vascular plants are unique in the sense that they can absorb nutrients through their leaves. They appear to be small because they do not have the tissue structures to be large plants, but they are found all ... Read More

The Transpiration Process of Materials in the Xylem and Phloem (1344 words, 5 pages)

IntroductionUnlike animals, which have a heart and blood vessels which are responsible for transport within their bodies, animals rely on the phloem and xylem for the transportation of substances within their systems. As such, the movement of water, as well as other solutes up a plant from the roots to ... Read More

A Study of the Supernatural and Natural Causal Models of the Success and Failure of the Malagasy People (1235 words, 5 pages)

The world of farmers, hunter-gatherers, and fisherman is always a complex and risky one. Recently, Bram Tucker et. al. researched how people in the very unpredictable conditions of Madagascar credit their fortunes and misfortunes according to these practices, studying specifically the idea of co-existence thinking, which is the simultaneous application ... Read More

The Producer, Consumer, and Decomposer in the Human Body and Its Similarity to an Ecosystem (624 words, 3 pages)

The self-maintenance of an ecosystem is solely founded on thecirculation of energy as well as nutrients extracted from other sources.The energy flow through an ecosystem is basically through a food chain inwhich it is transmitted from the producers to the consumers and finally thedecomposers. A producer in the context of ... Read More

The Significance of Genes in the Establishment of an Individual’s Identity (605 words, 2 pages)

People vary depending on how much genes affect their identity. There is a difficult for Individuals to construct their genetic identity. Genetics has numerous insightful implications for personal identity. Michaels defines identity as an individuals sense of self, that is, the individual sense that describes who they are (2). The ... Read More

A Comparison of the Similarities and Differences Between the Eukaryotic and Prokaryotic Cells (310 words, 2 pages)

Eukaryotic and prokaryotic cellsEukaryotic and prokaryotic cells share many of the same properties but seem to differ as much as they relate to one another. First lets take a look at what it is that makes these two types of cells similar. Every cell is the most basic unit of ... Read More

A Comparison of the Similarities and Differences Between DNA and RNA (384 words, 3 pages)

DNA vs. RNADNA and RNA are both very important factors in the life cycle of a living cell. Each relies on the other to work as a team to produce what the cell needs to survive. While they both have a lot in common, it is how they differ that ... Read More

A Study on the Similarities and Differences Between Chimpanzees and Humans (641 words, 2 pages)

Chimpanzees are the closest living relative of human beings andremarkably, they are 99 percent identical in terms of the coding sequencesof their DNA. This shouldn't be surprising considering the similarities inmorphology between chimpanzees and humans, but the high level of similarityis surprising, considering some significant differences such as brain size.If ... Read More

The Alvarez Hypothesis as the Reason for the Extinction of Dinosaurs from the Earth (1006 words, 3 pages)

The fossil record indicates that dinosaurs roamed the Earth for morethan 180 million years before suddenly disappearing sometime around 65million years ago. Scientists were puzzled by the sudden disappearance ofdinosaurs and various competing theories were offered. The Alvarezhypothesis, named after scientists Luis and Walter Alvarez, offered acontroversial explanation that involved ... Read More

A Research on the Neanderthal Genes in the Human Genome (694 words, 2 pages)

Up to 4 percent of the DNA of modern humans consist of genes found inthe Neanderthal genome. Not until 2010 did scientists discover theseNeanderthal genes in the human genome, which provided strong evidence thatHomo sapiens not only coexisted with Neanderthals, but interbred andproduced viable offspring. Across non-African populations, it is ... Read More

An Experiment Documenting the Behavior of Woodlice in Different Environments (3225 words, 8 pages)

GCSE Biology Controlled AssessmentInvestigating the behaviour of woodlice in different conditions. Background information Woodlice belong to a biological class Crustacea. This class consists of mostly aquatic animals, which breath with the aid of primitive lungs, but despite that, they lack the features of most other land dwelling arthropods, like waterproof ... Read More

A Definition of the Condition of Chimerism in Animals (372 words, 3 pages)

Chimerism is a unique biological condition that can occur in animals when two zygotes which would normally form to become separate twins fuse together, creating one organism with two distinct sets of DNA in different locations. The word chimerism originates from Greek mythology the Chimera was a beast composed of ... Read More

A Proposal for the Restoration of Large Wild Vertebrates from the Pleistocene Era into North America in Re-wilding North America (1593 words, 6 pages)

In the journal article Re-wilding North America, twelve conservation scientists and scholars wrote a proposal for restoring large wild vertebrates from the Pleistocene era into North America. The Pleistocene era is defined as first epoch of the Quaternary period. These biologists accepted that the presence of the human species was ... Read More

The Use of Fisher’s Principle to Explain the Sex Ratio (781 words, 3 pages)

At birth, the sex ratio favors males by an average of 1.03. In simpleevolutionary terms, it would make more sense for there to be far morefemales than males, since males are capable of reproducing with a largenumber of females in a shorter timespan than females can. In nature,particularly among sexually ... Read More

Should Embryos Be Stored to Cure Diseases or Replace Body Parts? (472 words, 2 pages)

Should Embryos be Stored to Cure Diseases or Replace Body Parts?Medicine, surgery, vaccines science has gone so far in preserving life. Ages ago people used to suffer from countless diseases such as polio, turbeculiosis, smallpox etc. but advances in medicine nowadays has either prevented these diseases or completely eradicated them. ... Read More

The Colony Collapse Disorder (CCD) and How It Affects the Production of Food Leading to Food Shortages (725 words, 3 pages)

It would be strange, wouldnt it? To walk into the grocery store and find that the store has barely any produce. There might not be any carrots or onions, broccoli or lemons, nor apples or honey. No more to enjoy moms homemade apple pie or grandmas applesauce. Imagine all of ... Read More

An Argument in Favor of Utilizing Stem Cell Research (653 words, 2 pages)

The issue of stem cell research has been a source of both scientific and religious debate in the United States for many years now. This controversy is derived from the ethical question of whether a human embryonic stem cell can be considered human life. If these embryos can potentially be ... Read More

An Experiment on How Gram-Positive and Gram-Negative Cell Walls Share Similar Optimum Growth Temperatures (3673 words, 20 pages)

ABSTRACTBacterial cell walls provide a buffer and a means of protection from environmental stressors, such as temperature and pressure. There exists two unique cell wall structures in bacteria, namely Gram-positive and Gram-negative cell walls. A Gram-positive species cell wall contains a thick peptidoglycan structure whereas Gram-negative species contain a thinner ... Read More

A Study on Theories of Aging in Late Adulthood (324 words, 3 pages)

Theories of Aging in Late AdulthoodAugust Wiemanns wear and tear theory, as cited by (Jin and Kunlin 70) suggests that aging is a cellular level process resulting from environmental, dietary and emotional pressures subjected to the human body. The Hayflick Limit Theory alternatively proposes that aging is the result of ... Read More

The Circadian Rhythm: The Internal Clock of the Human Body (668 words, 2 pages)

The human body has its own internal clock called the circadian rhythm.This internal clock gives the us the ability to know what part of the dayit is, even if you were locked in a dark room with no clocks. Whileexperiments have shown in the absence of light and other environmentalcues, ... Read More

The Reasons Why Viruses Should Not Be Classified as Living Organisms (557 words, 2 pages)

Did you know that the average virus is almost 100 times smaller than a human cell? Viruses do not grow and develop, they do not maintain homeostasis, and viruses do not respond to stimuli. Viruses are extremely small infectious organisms that can be considered nonliving in many peoples opinions. They ... Read More

Steinbock’s and Singer’s Views on the Ways to Maximize Pleasure and Minimize Pain for Animals (1087 words, 3 pages)

Meat and chicken have always been around to eat. Young children never question whether it is okay to eat, but where it came from. Growing older those children learn the cruel and unnecessary pain those animals are put through, but most still continue to eat meat. Singer explains the need ... Read More

An Analysis of Anaximander’s Conclusion on the Origin of Beings and Things (1047 words, 4 pages)

Thesis Anaximanders conclusion that one thing did not have an origin is untrue, and all things had an origin, even the first beings. Anaximander argues that in order for infants and young children to survive, they must be cared for by an older figure. Therefore, the first human beings must ... Read More

The Fascinating Development of the Human Body and Its Changes within Ten Years in the Movie Inside the Human Body (716 words, 2 pages)

The human body is very fascinating on how it develops and how it controls itself. In the movie Inside The Human Body it demonstrates how the body develops and how it changes every ten years. Everyones body is unique. It goes from an embryo to an old age person who ... Read More

An Experiment to Transform DNA Found in the Bacteria E. Coli (1081 words, 8 pages)

AbstractThe main objective of this experiment was to transform DNA found in bacteria. A plasmid was used on E. coli and with the use of heat shock, was inherited by the bacteria which caused the E. coli to become resistant to ampicillin. Also in the plasmid was GFP which verified ... Read More

A Lab Experiment on the Examination of the Homeotic Genes and Their Regulation of Embryonic Development in the Fruit Fly (1255 words, 8 pages)

IntroductionIn this lab we used the fruit fly, Drosophila melanogaster, to examine homeotic genes and their regulation of embryonic development. Homeotic genes are responsible for the regulation of segmental identity. Ed Lewis laid the groundwork for understanding homeotic genes, earning the 1995 Nobel Prize along with Christiane Nusslein-Volhard and Eric ... Read More

A Lab Experiment to Examine the Maternal Effect Genes and the Regulation of Embryonic Development in the Fruit Fly (1317 words, 8 pages)

1530 Developmental Biology LabLab 9 Genetic Regulation of Embryonic Development in Drosophila II. Maternal Effect GenesIntroductionIn this lab we used the fruit fly, Drosophila melanogaster, to examine maternal effect genes and their regulation of embryonic development. Mutations in maternal effect genes only cause patterning disruption when the mother is homozygous. ... Read More

A Lab Experiment on the Effects of Mutant CX4148 Gene C. Elegans on the Behavior of Various Bacterial Strains (2852 words, 10 pages)

Caenorhabditis elegans Bacterial Interactions Research Paper Mutant CX4148 gene in C. elegans may affect behavior toward various bacterial strainsAbstract C. elegans, a species of soil roundworms, have been the choice model organism among scientists for experiments regarding the immune responses of organisms to various strains of bacteria and infections. In ... Read More

The Different Invasive Plant Species and Their Impact on the Ecosystem (2443 words, 7 pages)

Invasive Species of woody shrubs and trees in Maryland are a concern because any invasive plant species can threaten the lives of native plants and animals hence harming ecosystems. The dangerous thing about invasive species is that they have mechanisms to colonize and to out-compete and exclude native vegetation. By ... Read More

A Study on the Body of a Trilobite and Its Sections (1021 words, 3 pages)

The body of a Trilobite is divided into three sections from top tobottom and from one side to the other. The head section of the Trilobite iscalled the Cephalon, moving down towards the tail there is also the Thoraxand the Pygidium. In the Cephalon is the Glabella, this housed the ... Read More

Biology Essay Examples