Living things need water in their cells. Water is the universal solvent - most of the chemicals a cell needs is dissolved and transported in water. Water is an environment where chemical reactions can occur and water is needed in many of those reactions - like the hydrolysis reaction (needed in the break down of food molecules). If a cell becomes dehydrated chemical reactions slow down. Chemical balance of the cell is changed as waste materials are not removed fast enough, food is not broken down, etc. Water also helps regulate the heat that can build up in a cell during chemical reactions. A dehydrated cell = increase in cell temp. Water content of a cell also affects the pH of a cell environment. Certain reactions occur better at certain pH. Homeostasis is maintaining a balance with the the environment. Without water the balance is upset.
<u>Answer:</u>
The factor that contributes to aging is: A Cells stop dividing after 50 divisions.
<u>Explanation:</u>
- Normally after 40 to 50 divisions the cells stops dividing because they had already lost too much DNA for other divisions.
- So they eventually die, making the appearance like an aged person in any individual.
- As DNA is copied in every cell division process, they tend to loose small part of telomeres in each transfer process.
- Hence, after 50 divisions these cells fails to divide resulting in aging.
In order to prevent drug abuse a combination of strategies might be very helpful. As there are more than one reason for a person to become a substance abuser there also are many ways to prevent it. First of all, there should be family support and good communication so there should not be barriers. And if the problem is already present the worst thing to do is to refuse it and pretend it is not happening because, in that way, it is impossible to help a person. On the other hand, it is importan to avoid negotiation, rules should be strict not to let a person to be tempted or find an easy way out. Good decisions should be made within a family and with professional help so everybody is aware and all members could go in the same direction. Last but not least, making a plan , an action plan wold be very wise so everybody knows what to do and could collaborate in the process.
Answer:
because they partly copy the original ones thereby using substandard things to make them look like the originals
