Randall has long attributed his ulcer to his high stress job as a bond trader and is astounded when his doctor tells him his ulcer is likely to be associated with an infection instead. What infectious agent has been associated with gastric and duodenal ulcers as well as gastric cancer?

When plants use sunlight to make food, the energy of sunlight is

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

Adoença vitiligo afeta qual doença do corpo?