Mouth. Food starts to move through your GI tract when you eat. When you swallow, your tongue pushes the food into your throat. A small flap of tissue, called the epiglottis, folds over your windpipe to prevent choking and the food passes into your esophagus.
Esophagus. Once you begin swallowing, the process becomes automatic. Your brain signals the muscles of the esophagus and peristalsis begins.
Lower esophageal sphincter. When food reaches the end of your esophagus, a ringlike muscle—called the lower esophageal sphincter —relaxes and lets food pass into your stomach. This sphincter usually stays closed to keep what’s in your stomach from flowing back into your esophagus.
Stomach. After food enters your stomach, the stomach muscles mix the food and liquid with digestive juices. The stomach slowly empties its contents, called chyme, into your small intestine.
Small intestine. The muscles of the small intestine mix food with digestive juices from the pancreas, liver, and intestine, and push the mixture forward for further digestion. The walls of the small intestine absorb water and the digested nutrients into your bloodstream. As peristalsis continues, the waste products of the digestive process move into the large intestine.
Large intestine. Waste products from the digestive process include undigested parts of food, fluid, and older cells from the lining of your GI tract. The large intestine absorbs water and changes the waste from liquid into stool. Peristalsis helps move the stool into your rectum.
Rectum. The lower end of your large intestine, the rectum, stores stool until it pushes stool out of your anus during a bowel movement
Answer:
The correct answer is C. epigenetics
Explanation:
Epigenetics is the study of change in the phenotype that occurs not due to change in the DNA sequence but because of gene expression modification. So here we study the changes that occurred in phenotype, not in genotype.
DNA methylation, histone modification, etc can be responsible for the epigenetic changes in an organism. In DNA methylation, a methyl group or methyl cap is added to the DNA segment which prevents the expression of some genes.
The skin cell, brain cell, and muscle cells have the same DNA but due to epigenetic change(change in expression), they look different. So the correct answer is C. epigenetics.
Answer:
The color alleles exhibit incomplete dominance
Explanation:
Incomplete dominance means that not one of the alleles has complete dominance over the other. Therefore, the trait/phenotype exhibited by the organism is the intermediate between the two alleles. This is also similar to offpsing of parent with straight and wavy hair alleles. The offspring will exhibit wavy hair trait.
In the f2 generation, 50 % of offspring will have pink flowers while 25% will have red and 25% will have white.
Hair color or Eye color , one of the two
hich statement best describes how biodiversity supports the sustainability of an ecosystem?
Biodiversity allows laws to be passed in order to protect species.
Biodiversity prevents habitats from being destroyed by people.
Maintaining diversity allows species to use up the resources in an ecosystem.
Maintaining diversity ensures that species can continue to depend on one another.
the answer is d...Maintaining diversity ensures that species can continue to depend on one another.
im taking the test i know..
