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life although there is no universal agreement as to a definition of life, its biological manifestations are generally considered to be organization, metabolism, growth, irritability, adaptation, and reproduction. Protozoa perform, in a single cell, the same life functions as those carried on by the complex tissues and organs of humans and other highly developed organisms. The attributes of life are inherent in such minute structures as viruses, bacteria, and genes, just as they are in the whale and the giant sequoia. In seeking an understanding of life, scientists have broken down many barriers that once separated the physical sciences from the biological sciences; a result of the growth of biochemistry, biophysics, and other interrelated fields of study has been a better understanding of the composition and functioning of living tissues of all kinds. Characteristics of Life Organization is found in the basic living unit, the cell , and in the organized groupings of cells into organs and organisms. Metabolism includes the conversion of nonliving material into cellular components (synthesis) and the decomposition of organic matter (catalysis), producing energy. Growth in living matter is an increase in size of all parts, as distinguished from simple addition of material; it results from a higher rate of synthesis than catalysis. Irritability, or response to stimuli, takes many forms, from the contraction of a unicellular organism when touched to complex reactions involving all the senses of higher animals; in plants response is usually much different than in animals but is nonetheless present. Adaptation, the accommodation of a living organism to its present or to a new environment, is fundamental to the process of evolution and is determined by the individual's heredity. The division of one cell to form two new cells is reproduction; usually the term is applied to the production of a new individual (either asexually, from a single parent organism, or sexually, from two differing parent organisms), although strictly speaking it also describes the production of new cells in the process of growth. The Basis of Life Much of the history of biology and of philosophy as related to biology has been marked by a division of thought between vitalistic (or animistic) and mechanistic (or materialistic) concepts. In the most antithetic interpretations of these concepts, the vitalistic school maintains that there is a vital force that distinguishes the living from the nonliving and the mechanistic school holds that there is no essential difference between the animate and inanimate and that all life can be explained by physical and chemical laws. Such diametrically opposed views have actually seldom been held by investigators of either school; elements of both are usually involved. The animistic school, largely predicated on the inexplicability of the basic phenomena of life, has been greatly overshadowed by the accumulating weight of scientific data. As more and more is learned of the minute details of the structure and composition of the substances that make up the cell (to the extent that some have been synthesized chemically), it has become increasingly apparent that living matter is made up of the same (and only those) elements found in inorganic material, except that they are differently organized. The Origin of Life Fundamental religious concepts center around special creation and belief in the infusion of life into inanimate substance by God or another superhuman entity. On the other hand, many scientists have hypothesized that during an early geological period there gradually formed in the atmosphere increasingly complex organic substances composed of available inorganic compounds and water, utilizing ultraviolet rays and electrical discharges as energy sources. At a certain stage they formed a diffuse solution of "nutrient broth." Then in some way they were drawn together and developed the capacity for self-renewal and self-reproduction. In 1953, S. L. Miller synthesized several of the most basic amino acids in a glass flask by introducing an electrical discharge into an atmosphere of water vapor and some simple compounds thought to have been present naturally at the time when life first developed on earth. A more recent theory now widely held is that life originated in a volcanic setting more than 3.5 billion years ago, perhaps in hot deep-sea vents, utilizing a biochemistry based largely on sulfur and iron. The theory that life on earth came in a simple form from another planet has had small currency, although the discovery by Melvin Calvin of molecules resembling genetic material in meteors has given it some force. Bibliography See M. Calvin, Chemical Evolution (1969); E. Borek, The Sculpture of Life (1973); N. D. Newell, Creation and Evolution (1985); S. W. Fox and K. Dose, Molecular Evolution and the Origins of Life (3d ed. 1990); R. Fortey, Life (1998).

From Omilili

Plants and Nutrition-Welcome Guest Host Rainbow Chef

Will be discussing the effects that various plants have on health and nutrition. . That means that we will not be discussing specific topics having to do with human consumption of animal , too. I'm thinking about getting a small dehydrator. Plants and Nutrition Biology is the study

From Yahoo Answers

Question:1.When do plant cells differentiate in the plant life cycle? 2.How do plants facilitate this process of differentiation and what does cell specialization and differentiation do for a plant?

Answers:1. Plant cell are constantly differentiating in a plant, as long as it has embryonic tissure (i.e. buds). In these buds, embryonic cells are born, grow and differentitate into all sorts of plant cell types. 2. Plants facilitate the process by bringing to these burgeoning cells all the nutrients they need in their infancy. This differentiation process is crucial because it creates all the different types of cell a plant needs to live, i.e. conducting cells, structure cells, photosynthetic cellls, root cells, etc.

Question:Im having a midterm and i don't know what the basic life processes are. its for biology and i know some of them like excretion and respiration and stuff. Plz Help i know there is more then 6 theres adapation, i know for a fact theres about 11 or 13 thats what my teacher said srry

Answers:Here are the seven activities of all living things. If you remember that someone has an auntie called MRS GREN you will be able to remember all seven activities. Movement Respiration Sensitivity Growth Reproduction Excretion Nutrition

Question:I Need To Know Like What Animals And Plants Are In This Area. And I Also Need To Know If They're A Developed Or Developing Country. Please Help Me! xD

Answers:It's a developing country. This page has a lot of information on Swaziland: It's not hard to find information, just search on Google.

From Youtube

Feel Better with the 4 Steps of Nutrition

This video clears up some misconceptions about nutrition. Many people think nutrition is just what you eat but it's actually a four step process; eating, digestion, absorption of nutrients and elimination. If you would like to feel better, have more energy, lose weight, be more happy, sleep better, have less stress, have fewer medical bills, become more healthy, etc. then learning about nutrition can help you. Nutrition not only affects you physical health but also your mental health. If you take care if your body you will function better in life. You can visit Natalies website at This video was produced by psychetruth http Full versions of psychetruth videos are available on Copyright 2007 Zoe Sofia This video may be copied, displayed or redistributed for any strictly non-commercial use only in its full unedited form only. Alteration or commercial use prohibited. Health nutrition Natalie mental fitness fast food weight self help improvement wellness psychtruth alternative

Whole Foods Nutrition for Healthy Kids Kids need whole foods to be healthy. As parents responsible for our kids' nutrition, we need to provide them with a variety of the freshest, organic, whole foods so their bodies can be healthy and develop fully. Whole foods are unrefined grains, beans, nuts, seeds, fruits and vegetables. Your child's body relies on the nutrients from these foods for proper growth as well as mental and physical vitality. A deficiency of even one important nutrient can cause imbalances that can lead to serious disease. Whole foods also provide a wealth of protective compounds that can help prevent disease. Whole Grains Whole grains are much more nutritious than refined (white flour) grains. A grain is whole and unrefined if the entire kernel is left unaltered and intact. There are three parts to a whole grain - the endosperm, germ and bran. The endosperm contains mostly starch and protein. The germ is rich in unsaturated fats, protein, carbohydrates, vitamin E, B-complex vitamins and minerals. The bran provides a large concentration of fiber and also contains minerals and B vitamins. Through the process of refining, the germ and bran are both removed, leaving only the endosperm. This process strips the grain of most of its nutritional value, including precious compounds and plant sterols that are important in preventing disease. Many grains are now refined for commercial purposes. Refined products are white flour breads, rolls, baked goods and most crackers ...

Prozac in the Drinking Water! - Nutrition by Natalie

Be My Friend - Prozac in the Drinking Water! - Nutrition by Natalie A number of scientific studies have found Prozac and other pharmaceutical drugs in streams, rivers and even the drinking water in some places. Please visit Natalie's website at This video was produced by Psychetruth http Copyright 2007 Zoe Sofia. All Rights Reserved. This video maybe displayed in public, copied and redistributed for any strictly non-commercial use in its entire unedited form. Alteration or commercial use is strictly prohibited. There pharmaceuticals can not be filtered out through the wastewater treatment plants and so are simply dumped in the environment and eventually make their way into the wild life. The effects of these drugs on the wild life has included retarded development, reproductive problems, male fish developing female genitalia and inhibited growth. Traces of Prozac have been found in the liver, brain tissue and muscle tissue of fish.


Plants. Plants ~ Life. The importance of plants for this planet. Show them some care and respect. Plants are living organisms belonging to the kingdom Plantae. They include familiar organisms such as trees, herbs, bushes, grasses, ferns, mosses, and green algae. The scientific study of plants, known as botany, has identified about 350000 extant species of plants, defined as seed plants, bryophytes, ferns and fern allies. Green plants, sometimes called Viridiplantae, obtain most of their energy from sunlight via a process called photosynthesis. Photosynthesis (from the Greek - [photo-], "light," and [synthesis], "putting together", "composition") is a process that converts carbon dioxide into organic compounds, especially sugars, using the energy from sunlight. Photosynthesis occurs in plants, algae, and many species of Bacteria, but not in Archaea. Photosynthetic organisms are called photoautotrophs, since they can create their own food. In plants, algae and cyanobacteria photosynthesis uses carbon dioxide and water, releasing oxygen as a waste product. Photosynthesis is vital for life on Earth. As well as maintaining the normal level of oxygen in the atmosphere, nearly all life either depends on it directly as a source of energy, or indirectly as the ultimate source of the energy in their food. The amount of energy trapped by photosynthesis is immense, approximately 100 terawatts, which is about six times larger than the power consumption of human ...

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