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True cells with a wall, membrane, cytoplasm, ribosomes and DNA. No distinct nucleus DNA not incorporated in chromosomes but comprising a single, circular strand Bacteria may have plasmids = a......

or RNA in a protein coat (capsid). They have no nucleus, cytoplasm, or membranes. They do not carry out cellular functions. Viruses contain very few......

Definitions used in behaviour : Causation : When we seek to explain a patter of behaviour in terms of events that immediately precede it. eg. A driver stops after seeing a red light. The man......

Important Information: Atomic no. - 17 RAM - 35.4526 Melting point ( oC ) - -100.99 Boiling point ( oC ) - -33.97 Density (g/cm3) - 3.214 Chlorine is a greenish yellow gas. It is increasing in......

This section introduces respiration as a process for transferring energy from food (e.g. glucose) to the cells of an organism. Oxygen is normally required for respiration and carbon dioxide......

Euthanasia The term 'Euthanasia' comes fromthe Greek word for 'easy death' . It is the one of the most publicpolicy issues being debated about today. Formally called 'mercykilling' ,euthanasia is......

Conception Viability Foetus Sanctity of life Quality of life When the sperm fertilises an egg When a foetus is able to live independently from its mother An unborn, developing child Life is......

Element Pure substances, made up of atoms with the same number of protons. MixturesMixture of pure substances. Mixtures have the properties of the different substances that make it up. Melt at a......

Contact lenses, a relatively new invention,have allowed people with eye disorders who may have had to previously wearglasses have been given the chance to wear contact lenses as analternative.......

The heart muscle contracts rhythmically with a period of rest between eachcontraction. The contraction period is called the systole & the relaxation period is called the diastolE. The heart is......

Respiration Respirationis a process that takes place in all living cells. Respiration transfers energy from foodmolecules in animals and plants energy from respiration is used to make......

A placeof your own Finding the right office premises will help youimprove productivity, attract and retain good employees, and give a positive impression of the business to yourcustomers.......

Glycolysis - 1 glucose molecule: · 2moleculesof ATP (4created-2 used) · 2molecules of NAD+reduced to 2NAD +2H+(transferred toelectron transport system). · 2molecules of pyruvate 2x3carbons (they......

Mostof our characteristics are controlled by more than one pair of alleles and canalso be influenced by our environment. Several allelomorphic pairs probablydetermine our height, it also depends......

Abortion and euthanasia are the most controversial topicsfaced by the world today, people hold different views about them some are infavour whilst some are against it. In this coursework I will try......

The Skin InHumans the skin has two major layers. The outer, relatively thin epidermis iscomposed of closely packed cells with little intercellular material; itprovides the barrier against attack......

Condensation Reaction Reagents: concentrated H2SO4catalyst Conditions: Room Temperature, then add water and warm under reflux Oxidation Reaction Reagents: Alkaline Potassium Manganate(VII)......

Wavelength: Sources: Gamma rays are emitted from the nuclei of radioactive atoms during decay.Radioactive decay is spontaneous. This can occur when a neutron splits into anelectron and a......

· Pathogenic bacteria are uncommon in humans · True cells · Feed by extra-cellular digestion · Reproduce asexually by spore production · Consist of fruiting bodies and fine threads calledhyphae......

not fight pathogens directly. An antibody, or immunoglobulin,is a y-shaped protein molecule that is made by a B-lymphocyte in response to aparticular antigen......