Free Biology Essay Examples and Topics | Page 61

The effect of Sildenafil (viagra) on antral follicle development in sheep Biology Literature review

4 pages (1000 words) , Download 2 , Literature review

In sheep, folliculogenesis is the key process in reproduction and involves the development of ovarian follicles from a small pre-antral follicle into pre-antral then into antral and finally the large pre-ovulatory follicle followed by the corpus luteum formation after ovulation.

Preview sample

How does the immune system response to V.cholerae infection Biology Research Paper

3 pages (750 words) , Download 17 , Research Paper

Free

It is significant to note that the response is not specific in nature and does not target specific pathogens. In the first response, the IgM will be responsible for the detoxification of the pathogen by the antibodies. IgM is efficient after the initial attack by the pathogen.

Preview sample

sponsored ads

Hire a pro to write
a paper under your requirements!

Win a special DISCOUNT!

Put in your e-mail and click the button with your lucky finger

YOUR PRIZE:

—

Apply my DISCOUNT

The affect of temperature as an environmental pressure that affects mammalian life Biology Research Paper

3 pages (750 words) , Download 4 , Research Paper

Free

These animals are known to regulate their body temperature, which is a significant factor influencing their life and physiologic processes. Temperature, which denotes the intensity of heat possessed by an object or substance, is often a significant element of climate.

Preview sample

The Role Played by Evolution Biology Research Paper

4 pages (1029 words) , Download 2 , Research Paper

Free

The role played by evolution in shaping over five million living organisms on the Earth. Moreover, the article elaborates on the several facets of evolution. This includes the notion that all living species share a common ancestry. The theory states that there exists a relation among the entire world’s species. The second facet pertains to the process of natural selection that drives evolution.

Preview sample

DNA Evidence Biology Research Paper

3 pages (750 words) , Download 3 , Research Paper

Historically, DNA evidence began in the forensic field when ABO blood group was used as a system in providing evidence of crime issues. Later, the paternity identification that based on serum protein variation became commonly used. However, it was not until when Jeffrey became a pioneer of DNA based identity testing.

Preview sample

Microbial Form and Function of Clostridium Botulinum Biology Essay

8 pages (2529 words) , Download 2 , Essay

Free

In UMNS the muscles tend to become weak, there is a lack of reciprocal inhibition, hypertonicity and a lack of control in body movements. By injecting the toxin an overactive muscle can be made to decrease its contraction level, hence allowing better reciprocal movements, resulting in improvements during body movements of the patient.

Preview sample

Invasive Species Biology Research Paper

5 pages (1250 words) , Download 2 , Research Paper

It is the vector of several viruses including those causing dengue. It has spread from Southeast Asia to North and South America, Europe, Africa and Australia through the transportation of tires. Several attempts have been made to control it but all have failed but there is a promise in genetic engineering in order to manipulate this species whose genetic make-up easily mutates.

Preview sample

Mutations - DNA Repair and Mutagenesis Biology Essay

3 pages (967 words) , Download 4 , Essay

Free

The repair pathway has been linked to colon cancer in humans via association with MI in colon tumors found in HNPCC families. MIs are short and repetitive sequences that are incorrectly copied by the DNA polymerase since the template and daughter strands found in the region are prone to misalignment.

Preview sample

The effect of NO/cGMP system on sheep somatic cell differentiation in vitro Biology Literature review

4 pages (1000 words) , Download 2 , Literature review

For this reason, a healthy ovarial follicle development is essential part of a successful pregnancy. The actual formation of the follicle antrum can trigger some rearrangement in the blood vessel network (Zimmermann et al., 2003). In line with this, Kaczmarek et al.

Preview sample

Use of the scanning electron microscopy in the food industry Biology Research Paper

6 pages (1500 words) , Download 3 , Research Paper

Free

Scanning electron microscopy (SEM), as well as other techniques such as energy dispersive spectroscopy (EDS) is an effective tool used for the identification and characterization of particulate contamination and foreign body contamination of food.

Preview sample

Asthma as a Manageable Condition Biology Research Paper

4 pages (1079 words) , Download 4 , Research Paper

Free

The coughing frequently occurs during the night or really early in the morning. In addition, most asthma patients usually complain that the chest feels tight during asthmatic attacks (flare-ups or exacerbations). Asthma attacks may occur infrequently like once or even fewer times a month, or as frequently as a number of times a day (Murphy 5).

Preview sample

Light experiment Biology Lab Report

6 pages (1500 words) , Download 2 , Lab Report

Physical aspects deal with requirements such as light, moisture and temperature. The chemical aspect entails properties of pH levels, and mineral composition while biological involves the relation to other biological aspects such as animals and plants within the same habitat.

Preview sample

Huntington Disease Biology Essay

6 pages (1662 words) , Download 3 , Essay

Free

Huntington's disease is caused by a faulty gene. Cells in parts of the brain are very sensitive to the effects of the faulty gene. This makes them function poorly and eventually die. A parent with the Huntington's disease gene has one good copy of the gene and one faulty copy.

Preview sample

Cloning, Its Definition, History, Progress, and Achievements Biology Research Paper

5 pages (1325 words) , Download 3 , Research Paper

Free

Cloning has now been at the edge of modern medical science for a few decades now. The initial success that leading cloning experts and researchers had with the creation of a cloned sheep Dolly initiated the enthusiastic pursuit of this controversial discipline that has far-reaching impacts on the biology of mankind, life and society at large as well.

Preview sample

Breast Cancer and Radiotherapy Biology Essay

3 pages (860 words) , Download 4 , Essay

Free

The glands are known as lobules. In the early stages of breast cancer, the disease appears to be confined to the fatty tissues of the breast. Then it is guessed to spread to other tissues near the breasts. These may include the tissues underlying the chest wall. At this stage, the cancer is said to be locally developed or advanced.

Preview sample

Nervous System and Drug Use Biology Essay

5 pages (1250 words) , Download 2 , Essay

Free

According to the report, the main source of controversy sets in with factors orienting to cocaine. This is because more than 2,100,000 people have perished globally so far because of taking alcohol. Comparing with twenty nine thousand deaths from in the United States of America along with the eighty five thousand deaths related to alcohol.

Preview sample

Alcaligenes faecalis Biology Research Paper

6 pages (1500 words) , Download 2 , Research Paper

Subsequently, numerous strains of the organism have been discovered. Alcaligenes faecalis is a “motile, flagellated, slender, slightly curved, non spore-forming, slowly growing, nonfermenting, nonencapsulated gram-negative aerobe of the family Achromobacter” state Kavuncuoglu et al (118).

Preview sample

Low Voltage Scanning Electron Microscopy Biology Research Paper

7 pages (1500 words) , Download 2 , Research Paper

Free

The author states that low-voltage electron microscopes (LVEM) have proven to be effective in comparison to High-voltage electron microscopes (HVEM). Both types of microscopes work on the same principles, but the significant different between them results from the effect of electron acceleration voltage variation.

Preview sample

Social Behavior in Animals Biology Essay

4 pages (1000 words) , Download 2 , Essay

Free

The deer is an animal that displays the aspects of socializing in an almost perfect way. There are over forty species of deer that are known to man. All these species have distinct social characteristics and are found in different parts of the world. Their behavior is determined by the environment that they are in.

Preview sample

Diseases Progression: Effect of HIV Virus on the Immune System Biology Term Paper

8 pages (2000 words) , Download 4 , Term Paper

While the immense genetic variability of this virus renders its genomic mapping to be extremely difficult, it also makes medicines against it futile with every mutation. The wide spectrum of diseases that is associated with this virus makes its management not only complicated for doctors and healthcare providers but also for the patient who is under immense pressure from not only his own failing health but also the stigma that is associated with this disease.

Preview sample

Topic: Aids/HIV Biology Essay

4 pages (1000 words) , Download 4 , Essay

These fluids transmit the virus, since it moves from the infected individual to uninfected person. HIV/AIDS is usually spread through sexual intercourse. Other forms of transmission include sharing of needles, especially when using them for street drugs, mother to fetus transmission, and even kissing (Johanson 236).

Preview sample

The effect of Salbutamol on the response of Ileum to Acetylcholine Biology Essay

2 pages (500 words) , Download 2 , Essay

Free

The effect of Salbutamol on the response of Ileum to Acetylcholine Response to question 1. From the graph, the EC50 of Acetylcholine is 4.00E-08, while the EC50 of Salbutamol + Acetylchline is 4.00E-08. The values for the Ec50 of Nicotine are 5.5E-06, and the EC50 OF Salbutamol + Nicotine is 5.00E-06.

Preview sample

Ecology Biology Research Paper

7 pages (1750 words) , Download 2 , Research Paper

The behaviors under study in this experiment were food searching, food handling, vigilance, and social behavior. We adopted a study design involved a focal study that allowed the researchers to observe squirrels for fifteen minutes. We observed several transitions from one behavior to the other as the squirrels strived to strike a balance between feeding and staying alert of any emerging predators.

Preview sample

The Effects of Fertilizer on Plant Growth Biology Research Paper

5 pages (1372 words) , Download 6 , Research Paper

Free

Fertilizers play a significant role in the growth of plants and farmers should establish which method of dressing best fits their plants. Some plants would perform better with layering while others perform excellently when fertile is top-dressed. Farmers should seek the services of consultants to help them understand how best they can maximize plant growth.

Preview sample

Water Quality Biology Research Paper

4 pages (1000 words) , Download 2 , Research Paper

Free

Water quality refers to the physical, chemical and biological distinctiveness of water. It is a measure of the state of water in relation to the needs of human beings or other living organisms. Water quality standards set a base of reference for assessment.

Preview sample

Critically discuss whether birth control is good or bad Biology Essay

4 pages (1000 words) , Download 2 , Essay

According to the United Nations, the world’s population has now reached 7 billion and is growing at a rate of 1.10% with each year and the average population change stands at 75 million individuals annually (Worldometers, 2012). This population is set to increase in the years to come.

Preview sample

HIV and the latino community in the U.S Biology Essay

4 pages (1000 words) , Download 2 , Essay

These are just the ones in the mainland. Other Hispanics in Puerto Rico, which is a Caribbean U. S. Territory, amount to 3.7 million more residents. Around the world, there are 34.2 million people living with HIV as of 2011. In that year alone, 2.5 million were newly infected (World Health Organization, 2011).

Preview sample

Molecular Biology of Sickle Cell Anemia Biology Term Paper

9 pages (2250 words) , Download 3 , Term Paper

One page. 5- Architecture of the cytoskeleton in normal red blood cells and compares it to sickle cell shaped. 6- Sickle red cells impair the blood flow causing series of tragic events! Sources: In attached files. Introduction: Sickle cell anemia is an inherited recessive blood disorder which is caused by a point mutation which leads to the faulty synthesis of hemoglobin in turn resulting in the production of pathogenic or diseased erythrocytes.

Preview sample

Human DNA Engineering and What Is the Conscience of Changing Human Race Biology Research Paper

4 pages (1182 words) , Download 2 , Research Paper

Free

Man's knowledge has heightened so much that it no longer seeks what is below its capacity. Rather it seeks even further and even more complex than it penetrates man existence. The desire to seek God or some form of perfection has been a constant theme through the eons of time and in all cultures around the world.

Preview sample

Lactic acid and ethanol fermentation Biology Lab Report

5 pages (1250 words) , Download 3 , Lab Report

Free

The word Fermentation is derived from Latin verb “fever” which means “to boil”. It is the process through which energy is derived from the oxidation of organic compounds such as carbohydrates, by using an electron accepter, usually an inner organic compound.

Preview sample

Research about Cholera disease Biology Research Paper

6 pages (1500 words) , Download 3 , Research Paper

Cholera is common is Asia, Africa, and Latin America. The characteristic incubation period of cholera is 1-5 days. The site of action of pathogen is the wall of small intestine. The bacteria cannot survive in the highly acidic contents of the stomach. However, if the bacteria manage to reach the small intestine they secrete a powerful toxin known as choleragen.

Preview sample

Antibiotics Biology Research Paper

3 pages (750 words) , Download 3 , Research Paper

Various antibiotics work differently on various types of bacteria, but for one aim. By definition, antibiotics are ineffective against viruses and thus prescribing antibiotics when unnecessary or ineffective encourages increase in antibiotic-resistant bacterial strains.

Preview sample

Overpopulation of Man O war causing reduced fish population Biology Essay

5 pages (1250 words) , Download 2 , Essay

Ecosystem in biological terms is referred to as the kind of the environment habited by a living thing. Man, or humans, can virtually live anywhere apart from underwater (Bradley, 2009). Man believes in being supreme over every other animal and that explains why as other animals adapt to their environments, man forces its environment to adapt to his specifications.

Preview sample

The Effect of Sildenafil on Embryo Development Biology Literature review

4 pages (1000 words) , Download 2 , Literature review

Free

This essay analyzes that to solve problems related to fertility problems, ART was developed as a promising solution. The in Vitro fertilization is a good example of ART. To increase the success rate of IVF, the clinical and laboratory procedures were enhanced in order to reduce the risk of side-effects on the part of the patients.

Preview sample

Persistence, Prevalence, and Emergence Patterns of Pasture Tunnel Moth Biology Essay

5 pages (1595 words) , Download 2 , Essay

Free

The following are the 22 families under the order Lepidoptera found in New Zealand: Batrachedridae, Choreutidae, Crambidae, Depressariidae, Elachistidae, Gelechiidae, Geometridae, Glyphipterigidae, Gracillariidae, Hepialidae, Micropterigidae, Mnesarchaeidae, Nepticulidae, Noctuidae, Nymphalidae, Oecophoridae, Plutellidae, Psychidae, Pterophoridae, Tineidae, Tortricidae, Yponomeutidae.

Preview sample

Biological Influences and Sensory Adaptation Biology Essay

3 pages (750 words) , Download 2 , Essay

The author explains that the way living organisms adjusts their bodies to the impressions of stimulation by adjusting to such stimulant after some time. "Sensory adaptation" is decreased sensitiveness of the sensory receptors because of overstimulation. This process enables living bodies to perform a function in specific unpleasant situations.

Preview sample

Teeth Erosion Biology Lab Report

7 pages (1750 words) , Download 2 , Lab Report

Attrition is the wear to teeth caused due to interaction between the teeth itself. Excessive loads can cause micro fractures in the enamel region. This is termed as Abfraction. (Adrian Lussi, 2006) Erosion of teeth on the other hand is a result of its interaction with acidic foods which causes decay to the teeth surface in a variety of ways.

Preview sample

Antibiotics and Agar Diffusion Biology Coursework

6 pages (1792 words) , Download 4 , Coursework

Free

The results of experiment 1 regarding the effects of potassium and calcium chlorides on antibiotic activity indicated that the zone of inhibition reduces with the increasing amounts of cations in the culture. Generally, Potassium chloride produces monovalent cations (K+) while Calcium chloride produces divalent cations (Ca2+ ).

Preview sample

The Rationale behind Antibody Usage in Common Laboratory Assays Biology Essay

11 pages (3217 words) , Download 2 , Essay

Free

Many clinical laboratory tests incorporate antibodies because of their unique feature in identifying and singling out among very much interrelated antigens. Any test concerning an antibody-antigen reaction is referred to as a serological test. These tests make use of the reality that a good number of viral, bacterial, fungal, and parasitic illnesses bring forth accomplished antibody rejoinders.

Preview sample

A Diet for Better Energy Written by Diana Rodriguez Biology Article

4 pages (1037 words) , Download 3 , Article

Free

Physical health is one of the most important aspects of human life. A healthy body not only ensures physical health but also ensures mental and emotional health. Hence, maintaining physical health is an important goal of human beings. However, to maintain good health, what is important is to eat food that is full of nutritious value.

Preview sample

USGS Bird Population Biology Essay

3 pages (991 words) , Download 2 , Essay

Free

Generally, generalists are usually common while specialists are rare to find. Generalists do not have special eating habits since they feed on anything that is available. Specialist species, on the other hand, feed on specific food and it is rare for them to change to a new environment (Peterson, 2010).

Preview sample

Foundations in human physiology- structure, function and permeability of cells Biology Assignment

7 pages (1750 words) , Download 2 , Assignment

This basic unit segregates the living beings into the major categories of plants of animals. Human beings (Homo sapiens) are classified as the most developed mammals within the Kingdom Animalia. The Cell Theory This theory was proposed by Schleiden and Schwann in 1838 (The Biology Project, 2004).

Preview sample

Experiment Mitosis Biology Essay

4 pages (1191 words) , Download 2 , Essay

Free

The experiment identifies similarities in mitotic stages for cells in both plants and animals. The mitotic process leads to the division of one parent cell to form two identical daughter cells that can further undergo subsequent mitotic divisions. Introduction Cells are the fundamental elements of living things, both plants and animals.

Preview sample

Microbiological effects from baby bottle misuse Biology Research Paper

4 pages (1000 words) , Download 2 , Research Paper

These distinctions in health consequences can be described in part by particular and inherent immune aspects available in human milk. The mother has plasma cells in the bronchial tree and intestine move to the mammary epithelium and emits antibodies particular to antigens in the immediate environment giving particular immune against micro-organisms in the mother’s surrounding.

Preview sample

Protein Estimation by Bradford's Method Biology Lab Report

3 pages (750 words) , Download 3 , Lab Report

Consequently, a destabilized protein level in the body, through inappropriate nutrition or through effects of diseases adversely affects body processes. The study of protein concentration in the body, as well as in substances is therefore fundamental to nutritionists and health care professionals.

Preview sample

Physiology and Adaptations of the Goblin Shark Biology Research Paper

6 pages (1942 words) , Download 2 , Research Paper

Free

The success of the sharks can be attributed to the diversity of their evolution, having a simple yet flexible skeleton, as well as being hardy creatures, even withstanding the wide-ranged extinctions of numerous species during the Permian-Triassic transition (Compagno, 1990). Sharks are mostly found in tropical to warm-temperate waters and can live in depths as deep as 2000 meters.

Preview sample

The pathology of Parkinson's disease, and how to counteract it Biology Essay

6 pages (1500 words) , Download 2 , Essay

Free

According to the research findings, it can, therefore, be said that the pathology of Parkinson’s disease is complicated making the treatment and control of the disease a complex task. The complexity of the disease has made it almost impossible for researchers to settle for a single approach to treating and controlling the disease.

Preview sample

Drug Addiction a Disease of the Brain Biology Research Paper

5 pages (1250 words) , Download 2 , Research Paper

Second, there is the school of thought that describes drug abuse as a type of self-fulfilling prophecy with relation to the way people understand and categorize it. What one can see from this debate, prior to seeking to develop their own point of view with relation to the issue, is that one viewpoint attempts to explain drug use by way of a mental/spiritual deficiency in terms of lack of willpower.

Preview sample

GALT Gene and Occurrence of Galactosemia Biology Essay

3 pages (962 words) , Download 2 , Essay

Mutations in a gene can lead to non-functional enzymes, disruption of protein structure, or altered protein conformation affecting normal protein functioning. Such abnormalities often result in various genetic diseases. For instance, mutations in the gene, GALT, can lead to an inherited autosomal recessive disorder called Classic Galactosemia or Galactose-1-phosphate uridyl transferase deficiency.

Preview sample

Agarose Gel Electrophoresis of DNA Biology Lab Report

5 pages (1250 words) , Download 3 , Lab Report

Free

(Westermeier 2006). Agarose gel electrophoresis is the most common and easiest technique to separate the DNA fragments. Agarose is a polymer that forms helical linking strands between the molecules and they are held together by hydrogen bonds. Based on the concentration of the agarose in the gel, the pore size also varies.

Preview sample

Biology Essays