What parts of the lymphatic system are used as filters to catch bacteria in the inhaled air? a. bronchi b. epiglottis c. trachea d. tonsils

Which test would show positive results for orange juice

Polar zones are cold and tend to be dry because of a pressure system of cold. low high

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.