Sexual Selection
Sexual Selection * Darwin noticed that there were certain features that he could not explain by Natural Selection * Such as differences in size, body form, colouration and behaviour between males and female of the same species - why are females often smaller and less colourful than males? o Infact, in some species, the male seems at a real disadvantage in that he would show up to predators by being brightly coloured, he might have huge antlers that mean he can hardly lift his head, or he may have a huge tail that would get caught in the undergrowth o Why would it make evolutionary sense to have such features that are only going to get you eaten??? Differences in the appearance etc. between males and females of the same species are referred to as SEXUAL DIMORPHISM Humans are sexually dimorphic to a certain extent with females being generally smaller, less muscular and without features such as facial hair Sexual Selection (as opposed to Natural Selection) was Darwin's solution to this problem: * He suggested that the differences must be due to an advantage they give in passing genes into the next generation * Females are 'in demand', so sexual selection will mostly operate on the males who have to work to get access to the females * The features will either help the males to compete with other males and 'fight them off' for access to the females, or they will make them
natural selection and the effects of environmental change
Natural Selection and the Effects of Environmental Change Human beings-as is every form of life on Earth-are the product of millions of years of random, unintentional mutations to the DNA of, at every stage, a less complex and more poorly suited organism. It is a process whereby something of low entropy keeps decreasing; whereas in the physical world, the general rule is the opposite, and things become less ordered as time unfolds, increasing in entropy1. There exists many qualms as to the origin of life on Earth, how it got here in the first place being the question scientists fail currently to categorically answer. But the defiant achievement to be even at the starting line is just the first improbable event (although a different topic to evolution) that allows such biodiversity, immensely complex structures such as the human brain (the most complex structure, in the universe, known to man) and a universal law, describing how every known organism got to the state it is at, to even exist at all, let only be, via completely unconscious mutations to DNA (a nucleic acid), malleable to its environment. The theory of evolution began with the work of an Austrian born scientist, whom used the freedom of being a monk to carry out genetic research in plants. His work provided the means to eliminate the idea of blending inheritance (this theory possessed flaws that simply don’t
Human resources for my business. The recruitment process is extremely important as it will allow me to gain fully qualified beauticians for my business by outlining all the requirements needed in a position at Asian Beauty and it will also save a lot of t
Human Resource Introduction Recruitment is the process of identifying that your business needs a new employee and recognising what the new employee's job should involve. The skills, qualities and experience required for the job will need to be established and as a result of this the right person will apply for the job. Recruitment includes four different stages, the job analysis, the job description, the person specification and advertising the job opportunity. The job analysis is the breaking down of a job into its component parts in order to identify exactly what the job requires such as, how many workers are needed?, and what qualities and skills the workers need. The job description is a document that describes the role of the job, this would contain basic information about the job such as, the job title, duties and responsibilities and who they will be responsible to. The person specification is a document that describes the skills, qualities and qualifications required in a person to successfully do the job and advertising the job opportunity is the process of informing potential employees that there is a vacancy in the business. The recruitment process is extremely important as it will allow me to gain fully qualified beauticians for my business by outlining all the requirements needed in a position at Asian Beauty and it will also save a lot of time and money.
The Haber Process
The Haber Process. For this chemistry coursework, I have decided to study The Haber Process. The Haber process was discovered by famous German scientists named Fritz Haber and Carl Bosch in the year 1909; it was then patented within 1910. During the process, Ammonia is manufactured from the reaction of Hydrogen and Nitrogen, where Ammonia is reversible and also decomposes under the same conditions. The reaction between Hydrogen and Nitrogen takes place over an Iron Catalyst under 200 atmospheres ranging from temperatures of 350ºc to 550ºc. The first time the process made use of was during World War One on an industrial scale by the German people. The Ammonia was oxidised for nitric acid in the Ostwald process. The Nitrogen from fractional distillation of liquid air is obtained from air and the Hydrogen which is from natural gas and steam is obtained from water. The balanced equation for this process is: CH4 (g) + 2H2O (g) CO (g) + 4H2 (g) = Reversible reaction The reaction involving Nitrogen and Hydrogen is a chemical equilibrium which means that depending on the conditions, the reaction can proceed in either a forward or reverse direction. The forward reaction is exothermic where heat is given out and the reverse reaction is endothermic where heat is taken in. However, if the conditions of the reactions such as temperature, pressure and concentration are
ICT in Business
ICT in Business The main aim of this assignment is to establish the growth of E Commerce within British Retail. In order to do this appropriate research methods must be carried out which will mainly be done via internet. The two main E Commerce businesses I have chosen to research are Amazon and eBay, which are the two major e commerce stores currently dominating the online market. British Retailing is also named as 'E Tailing', e-commerce consists of the buying, selling, marketing, and servicing of products or services over computer networks. The information technology industry might see it as an electronic business application aimed at commercial transactions. Out of the two chosen e commerce companies it has proven that eBay is one of the main dominating companies it has been predicted that by April 2010 online shopping will have expanded by 320% resulting £60 billion a year and accounting for 20% of all UK sales. Amazon was launched in 2000 and has taken on alliances such as 'Cars Direct', 'drugstore.com' and 'wireless phones.com' which has a connecting link to other British retail stores online. By Amazon and eBay using e commerce as source of British Retail it will enable consumers to access products a lot faster which will save time as opposed to going out and physically going to have to buy them. The benefits of using ICT within this specific area of British
The Process of Human Digestion
The Process of Human Digestion Digestive System, series of organs put together that purpose is to break down, or digest, the food we eat. Food is made up of large things called, complex molecules, which the digestive system breaks down into smaller things called simple molecules that get absorbed into the bloodstream. The bloodstream is our blood. The simple molecules travel through the bloodstream to all of the parts of the body, which we use for growth, repair, and energy. All living things that eat to get energy have a digestive system, a feature that makes us different from plants. Plants make their own food in a process called photosynthesis, photosynthesis is when plants make sunlight to convert water and carbon dioxide into simple sugars. But animals, including humans, must take in food in the form of organic matter, such as plants or other animals. Digestion generally involves two parts: a mechanical part and a chemical part. In the mechanical part, teeth physically break down large pieces of food into smaller pieces. In the chemical part, digestive chemicals called enzymes break apart individual molecules of food to yield molecules that can be absorbed and distributed throughout the body. These enzymes are secreted by glands in the body. The digestive system of most animals consists mainly of a long, tube called the alimentary canal, or digestive tract. This canal
The Process of Protein Synthesis
Process of Protein Synthesis Task 1 (1a) DNA: RNA: RNA has a single polynucleotide chain where as DNA has a double polynucleotide chain, RNA has 3 basic forms t, m, r, and DNA has 1 form only; in RNA the molecular mass is smaller than in DNA as DNA has a greater molecular mass. In RNA it has nitrogen containing bases which are adenine, guanine, cytosine and thymine however this is different to DNA as DNA has a nitrogen containing bases which are adenine, guanine, and cytosine but instead of thymine it contains uracil. RNA contains Ribose sugar whereas DNA's sugar in deoxyribose and RNA occurs in nucleus and cytoplasm, but DNA occurs almost entirely in nucleus; RNA maybe chemically unstable unlike DNA which is always chemically stable as RNA only exists for a short period of time unlike DNA which exists permanently. (1b) DNA RNA * DNA is vital for inheritance, coding for proteins and the genetic blueprint of life. * There are three bases in DNA code for one amino acid. * * The DNA code is copied to produce mRNA; the order of amino acids in the polypeptide is determined by the sequence of 3-letter codes in mRNA. tRNA mRNA * tRNA (transfer RNA) is a type of RNA that delivers amino acids to ribosomes during translation in the order specified by the mRNA. * tRNA pulls the amino acids into the rRNA (ribosome) and adds them to the polypeptide protein
How employee performance is managed and measured at a business
Assignment 4-How employee performance is managed and measured at a business .0 Introduction I will write a report regarding an employee working at Tesco, and analyse how Tesco look at their employees and review their performance and see how they manage them. This is so that they can get the best performance out of them, as different people need different ways of managing them. This leads to performance improvement, the measures leading companies use to effectively manage employee development, rewards and recognition, recruitment and selection, and employee satisfaction and morale. 2.0 Findings 2.1. How Tesco manage and measure a performance of an employee Tesco is a global company and for them to remain one of the best they must man manage their staff, and measure how well they are performing as an employee, this not only benefits the company as sales will be better but also the employee can see what areas they are exceeding at, but also what areas they can improve upon. Performance Management- There is many approaches that Tesco take upon to the development of a sound performance management system with employees. Tesco believe that an employee must have clear work plan objectives that are aligned with the goals of the company, measurements to assure whether an objective has been achieved, such as has the employee reached their sales total of the day. An assessment of
business online
Task 1 In the report I will be investigating why it is important to have a business online, how it affects the business and the importance to investors and other businesses. I have chosen two businesses to research how being online helps them what their aims and objectives are A) 1. The online business I've chosen is Amazon 2. The super market I've chosen is Tesco B) Amazon.co.uk is famous for selling books but the turn over wasn't making enough profit, but now they sell other stuff like from cameras to coffee machines, exercise videos to Elvis CDs, they say there's something for everyone. They also enable independent sellers to sell new and used items on their website via Amazon.co.uk Marketplace. Within Amazon.co.uk you are able to use a variety of resources to help you make your choice, this including customer reviews and personal recommendations. The Amazon Associates program was the first online affiliate program of its kind when it launched in 1996. Today, it is the largest and most successful online affiliate program, with over 1,000,000 members world-wide Customer Focused - Amazon seeks to be the world's most customer-centric company, a place where people can find and discover anything they might want to buy online. Previously Amazon only sold books, music and toys, as they found out that they weren't even breaking even so they decided based their company
Evaluate the strategies that a business can adopt during a recession
Evaluate the strategies that a business can adopt during a recession A recession, two negative quarters of GDP in an economy, is inevitably going to lead to a business getting less customers. Its overhead costs will be the same, but its unit costs will be higher because it will not be producing as many products but will still have these fixed costs. This will make the business less profitable in the short-term and so strategies must be implemented to try to improve the business's short-term and long-term prosperity. Such strategies might include improving its cash flow position, downsizing, decreasing its costs, decreasing its gearing and managing its receivables and payables more carefully. A strategy of improving cash flow will involve many aspects. They will need to decrease their fixed costs so that their unit costs will decrease and it will be easier to make a profit in the difficult economic climate. This may involve selling off excess machinery or ordering less inventories, or it may involve increasing its operational efficiency by holding less inventories and thus lowering its storage costs. Ultimately, improving its cash flow will enable the business to remain more liquid in hard times, where investors (e.g. banks) will be less financially lenient, in the way of loaning money to businesses, during a recession. Thus it is more crucial than ever for a business to
