Biology Revision for "O" level examinations

Check this link for a Biology test. http://www.scribd.com/doc/47575372/Exam-Bio-F4-T1-2010-11

Taxonomy All living things (organisms) have seven characteristics in common. They all: 1.  Reproduce - produce an offspring (organism of its own kind) 2.  Feed/need nutrients - make their own food (plants), or consume readymade food as a source of energy 3.  Respire - release energy from food with the aid/use of oxygen 4.  Grow - increase in size by getting taller or wider 5.  Excrete - get rid of unwanted substances 6.  Move - plants move parts of themselves while animals often move from place to place 7.  Sensitive -   plants and animals react to changes in the environment. Although all organisms have these characteristics, there are differences amongst them that enable them to be classified differently. Biological classification was originated in the work of the Swedish naturalist Carolus Linnaeus, where classifications were done based on shared physical characteristics. The science of classifying into ordered systems that indicate a natural relatio

The Characteristics of Life The common characteristics for life is that all lives are well organized, they need to use energy, they grow and they reproduce themselves, all lives can respond to environmental stimuli and maintain relatively stable internal environment (homeostasis).  Branches of Biology There are many subdivisions in biology. For example, if classified by the subject of the study, there are anatomy, botany (or plant sciences), marine biology, anthropology, zoology and microbiology. If classified by the functional studies, there are molecular biology, biochemistry, biophysics, genetics, physiology, cell biology, developmental biology and ecology.  To understand how life evolves and changes over the time, there is evolutionary biology.  All these branches are aimed to understand life, and the purpose is to better serve our human health and living conditions.  Medical science is overly based on biology studies. Tools To Study Biology The metric system is used for

Science and the Scientific Method     Science is an objective, logical, and repeatable attempt to understand the principles and forces operating in the natural universe. Science is from the Latin word,  scientia , to know. Good science is  not  dogmatic, but should be viewed as an ongoing process of testing and evaluation. One of the hoped-for benefits of students taking a biology course is that they will become more familiar with the process of science.      Steps in the scientific method commonly include: Observation: defining the problem you wish to explain. Hypothesis: one or more falsifiable explanations for the observation. Experimentation: Controlled attempts to test one or more hypotheses. Conclusion: was the hypothesis supported or not? After this step the hypothesis is either modified or rejected, which causes a repeat of the steps above. Reference:  http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookintro.html

Biology literally means "the study of life". Biology is such a broad field, covering the minute workings of chemical machines inside our cells, to broad scale concepts of ecosystems and global climate change. Biologists study intimate details of the human brain, the composition of our genes, and even the functioning of our reproductive system. Can a biology book give you the answers to these questions? No, but it will enable you learn how to sift through the biases of investigators, the press, and others in a quest to critically evaluate the question. To be honest, five years after you are through with this class it is doubtful you would remember all the details of meatbolism. However, you will know where to look and maybe a little about the process of science that will allow you to make an informed decision. Source: http://www.emc.maricopa.edu/faculty/farabee/biobk/BioBookintro.html

Hello everyone. The following website contains very useful contents that would help in your studies. Please check it out. http://wizznotes.com/biology "All men by nature desire knowledge" Aristotle

Here are some paper 1 question taken from GCE 'O' Level past papers. 1.A new cell is being examined.    Which feature would enable you to identify it as a plant cell or an animal cell? A The cell contains a single large sap vacuole space. B The cell contains glucose and amino acids. C The cell contains stored fat. D The cell surface membrane is partially permeable. 2. What is the function of chlorophyll in plants? A to absorb carbon dioxide B to absorb light C to absorb nitrate D to absorb water 3. Why is it important to include fibre in the diet? A It gives energy to keep the body warm. B It helps food pass through the gut. C It increases growth in young children. www.xtremepapers.net D It is easy to digest. 4. Which substance builds up in a muscle as a result of anaerobic respiration? A carbon dioxide B ethanol C lactic acid D water 5. Which processes return carbon dioxide into the atmosphere? A combustion and feeding B feeding and photosynthesis

Hello folks,  Check out this link for CSEC 2013 time table. Hope you have been studying!  http://www.cxc.org/examinations/timetables .