The question could just as well be asked “Are viruses living entities?” The question can’t be answered until we can come to an agreement on what a virus actually is. Since a virus is the smallest example we have that can change and grow, the question must be answered first. Is a cell a living thing? Is it nothing more than a piece of protein encasing an RNA or DNA string? If a virus is a living thing, then, yes, there are living beings without cells. If, however, http://directtelevisionpackages.com/, San Francisco Cable, we decide that a virus is only a piece of genetic material within a protein case, then we can say that life must begin and continue with a cell, even if that happens to be a single cell as in the case of an amoeba. Cells are what defines life itself in its simplest as well as its most complex forms, but what to do with the common virus? It has no membrane, no cell organelles and nothing else to define it as life. All of that said, viruses are generally accepted as living things but not everyone agrees, so it’s really up to the individual to make the distinction for himself.
When two types of animals cannot mate, they are often considered to be different species. However, this definition of species is not perfect, and there are many examples of animals that can mate with other animals that are clearly not members of the same species. The results of these pairings can be interesting and unexpected. Here are some famous examples.
When a male donkey and a female horse mate, the result is a mule. Mules can Read the rest of this entry »
Technology will soon be so advanced that expectant parents will be able to know almost everything about their child before he or she is ever born. Although this can come in handy in certain circumstances, it also raises some important moral and ethical questions. For instance, if you knew that your child was likely to develop a deadly disease early in life, would you opt to terminate the pregnancy or would you decide to carry it to term? These types of dilemmas are what the parents of the future Read the rest of this entry »
DNA is what make up genes in all species. DNA is composed of complex patterns of proteins that are responsible for eye and hair color, just to name a few. Human have genes for approximately one billion different traits. Yes, one BILLION. That’s a lot of DNA.
The basis for DNA testing is taking a small strand of DNA extracted from some cells. All cells that have a nucleus have DNA. Complex instrumentation can replicate Read the rest of this entry »
Most of us know how important genetics is to our health; however, some may not know that genetics are also important in the kind of work we do, who we socialize with and in some part, important in the career choices we make.
Genetics is most important for our daily health and in some cases, how long a life we live. We can inherit genes that make it more likely that we will come down with a disease or in some cases, we can inherit genes that Read the rest of this entry »
Everyone knows, that there are sanitation departments, that dispose of human waste. But most people aren’t aware of what happens to animal waste. Large farms, that raise pigs, cows and poultry have huge amounts of animal waste. Animal waste can carry dangerous bacteria. Bacteria can cause E. coli, salmonella and other illnesses in humans. If animal waste is not properly disposed, it can get into water sources. In addition, the animal waste can create dangerous gases.I found some more information July 2013