Which part of the digestive system starts the breakdown of proteins? esophagus large intestine small intestine stomach?

Development of new communities in disturbed environments, such as a burned or a clear cut forest, is called

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Cathy hypothesized that corn would not grow in mud. to test this hypothesis, she took corn kernels and placed 5 in mud, 3 in soil, and 2 in water. to her surprise, the kernels in the mud grew faster than the kernels in the soil. what error might have caused these unexpected results? a. wrong hypothesis b. not enough variables c. undefined control d. too many variables