dogs
1. All living things are made from the basic chemical ingredients. -Dogs like other organisms are made up of what we call DNA. -DNA is what makes the dog have a certain eye color and be a certain size. -There are lots of different breeds of dogs because not all their DNA is lined up the same. What DNA is made up of: Adenine Thymine Cytosine Guanine
2. Living things are composed of cells 2. Living things are composed of cells. Cells are the basic structural units of life. -Dogs of course like every other living thing are made up of cells. -Cells form the tissues and the muscle. Then the tissue goes and forms the organs which dogs need to survive. Ex. Heart , Lungs , Intestines.
3. Living things require water, and a source of energy. -Dogs need to water to stay hydrated , it helps regulate their body temperature, and it helps their digestive system work properly. -The food they eat is usually very high in protein to help build muscles.
4. Living things have the ability to reproduce. -Dogs can reproduce. -Female dogs have heat cycles. This means they can only be bred about three times a year. -The amount of puppies per litter depends on the type and size of the dog.
5. Living things all have a life span and will die. -The life span of a dog depends on what species they are. -Often dogs do not live out their full life span because of disease and sickness. -There are lots of diseases that dogs can catch that are very contagious. Distemper, which affects the respiratory and the nervous system. Parvo, affects the bowels. Hepatitis, which like in humans affects the liver.
6. Living things respond to their surroundings. -How dogs demonstrate homeostasis depends on the breed. -For example , Golden retrievers. In the fall they start growing a coat of very long and shaggy hair , this is too protect them from the cold in winter. Than when spring comes around they shed their hair so they can be comfortable in the warm weather of summer. -Dogs also pant when they are hot , and are trying to regulate their body temperature.
http://en.wikipedia.org/wiki/Dog http://voices.yahoo.com/10-dog-diseases-common-all-dog-breeds-5787772.html