The gastrointestinal tract (GI) involves the liver, pancreas and gallbladder. As food enters through the mouth, it passes through the GI tract. We have bacteria in the GI tract that helps to digest and break down our food into small molecules which in turn nourishes the cells of our bodies. It enters the bloodstream from the walls of the small intestine. The waste passes through the large intestine and exits our bodies as a stool. From the time we swallow food, our saliva wets the food and it slides down into the esophagus and into the stomach. Our stomach lining produces acid that digests the protein. The Pancreas then breaks down the carbohydrates and fats. These digestive juices come from small tubes or ducts. The liver produces a digestive juice known as bile. The gallbladder holds onto the bile between our meals. The bile acids dissolve fat into a watery product when the food reaches the small intestine and it combines with pancreatic juices and bile. Bacteria produces some of the enzymes needed to digest the carbohydrates. Hormones in the stomach lining causes the production of digestive juices. The brain will send messages to the nerves to rlease the chemicals. The chemicals cause the GI tract to contract ad relax which moves the food ultimately out the rectum.
Answer:
4.advantage
=surplus supply of food to some animals
disadvantages
=animals which eat the beans from some of these trees will have less supply of food due to valuable minerals and its waters are always stolen
5.the mistletoe population will increase
6.it is a parasitic
Operons are gene regulatory mechanisms that involve promoting and repressing genes that are involved in the metabolism of organic substances (i.e. sugars). Living organisms have the innate ability to metabolize glucose as the main source of energy. Although, in the absence of glucose, the organism must "learn" to use sugars other than glucose (such as lactose) in order to survive.
For instance, in the <em>lac </em>operon:
In the absence of glucose, various regulatory proteins promote the transcription of the gene related to the metabolism of lactose. This will ultimately lead to the production of the enzyme beta lactosidase which will enable the organism to use lactose as energy in the absence of glucose. This will therefore increase the chances of the organism for survival and will be naturally selected for evolution.
Answer:
bacteria
Explanation:
you can get sick by a bacterium that is on your bathroom floor or tub or anything really.
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