An ulcer can occur when a small hole or tear forms in the lining of the stomach. Ulcers can be caused by high levels of certain bacteria in the stomach and by lifestyle choices, such as heavy smoking, heavy drinking, and overuse of pain relievers. An estimated one in ten Americans will suffer from ulcers during their lifetime. However, most ulcers are relatively easy to treat with antibiotics and medications that help lower the production of acids by the stomach. Which tissue is most directly affected by the formation of an ulcer in the stomach?

a epithelial
b connective
c nervous
d muscle

videntify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.identify the dna change shown in the diagram and explain how that change can result in the increased genetic diversity often seen among siblings.

"a.) well–developed vascular system."

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

lesson summarykaryotypes a genome is the full set of all the genetic information that an organism carries in its dna. chromosomes arebundles of dna and protein found in the nucleus of a eukaryotic cell.