Published online Jul
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. Biologists recently all but completed the deciphering of the human genome, the sequence of deoxyribonucleic acid DNA bases that may determine much of our innate capabilities and predispositions to certain forms of behavior and illnesses.
DNA sequences have played major roles in criminal cases O. Simpson, as well as the reversal of death penalties for many wrongfully convicted individualsas well as the impeachment of President Clinton the stain at least did not lie.
We are bombarded with headlines about possible health risks from favorite foods Chinese, Mexican, hamburgers, etc. Informercials tout the benefits of metabolism-adjusting drugs for weight loss. Many Americans are turning to herbal remedies to ease arthritis pain, improve memory, as well as improve our moods.
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.
Theories of biology 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. Will you be a scientist? Yes, in a way. You may not be formally trained as a science major, but you can think critically, solve problems, and have some idea about what science can and cannoit do.
I hope you will be able to tell the shoe from the shinola. Science and the Scientific Method Back to Top 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.
Humans seem innately interested in the world we live in. Young children drive their parents batty with constant "why" questions.
Science is a means to get some of those whys answered. When we shop for groceries, we are conducting a kind of scientific experiment.
If you like it you may buy it again, even when it is not on sale. If you did not like Brand Y, then no sale will get you to try it again. In order to conduct science, one must know the rules of the game imagine playing Monopoly and having to discover the rules as you play!
Which is precisely what one does with some computer or videogames before buying the cheatbook. The scientific method is to be used as a guide that can be modified. In some sciences, such as taxonomy and certain types of geology, laboratory experiments are not necessarily performed.
Steps in the scientific method commonly include: Controlled attempts to test one or more hypotheses. After this step the hypothesis is either modified or rejected, which causes a repeat of the steps above. After a hypothesis has been repeatedly tested, a hierarchy of scientific thought develops.
Hypothesis is the most common, with the lowest level of certainty. A theory is a hypothesis that has been repeatedly tested with little modification, e. The Theory of Evolution. A Law is one of the fundamental underlying principles of how the Universe is organized, e.
Science uses the word theory differently than it is used in the general population. Theory to most people, in general nonscientific use, is an untested idea.
Scientists call this a hypothesis. Scientific experiments are also concerned with isolating the variables.Biology is a broad topic. There are certain givens within allstudies of biology. The cell is the basic unit of life, genes arethe base of heredity and evolution propels the cr eation of newspecies.
Evolution is considered the unifying theory of biology. Modern biology is based on several unifying themes, such as the cell theory, genetics and inheritance, Francis Crick's central dogma of information flow, and Darwin and Wallace's theory of evolution by natural selection.
In this first unit we will examine these themes and the nature of science. Yet theory plays a paramount role in biology. The best known example of a theory in biology is, of course, the theory of evolution by natural selection. Charles Darwin may have been a globe-trotting hands-on naturalist and geologist, but his outstanding contribution to science was theoretical.
Sub-disciplines of biology are defined by the research methods employed and the kind of system studied: theoretical biology uses mathematical methods to formulate quantitative models while experimental biology performs empirical experiments to test the validity of proposed theories and understand the mechanisms underlying life and how it appeared and evolved from non-living matter about 4 billion .
Darwin’s theory of evolution is the one most scientists accept as true. Darwin was a scientist in the s. Darwin was a scientist in the s.
He took a trip around the world to study plants and animals. Pages in category "Biology theories" The following 35 pages are in this category, out of 35 total. This list may not reflect recent changes.