Completa las siguientes proposiciones: a. La saliva contiene una enzima llamada que desdobla el convirtiéndolo en b. El produce la bilis cuya función es las grasas. c. El estómago produce que degrada las convirtiéndolas en d. El páncreas produce el jugo que contiene tres enzimas que son , y e. La bilis y el jugo pancreático actúan en .

Which of the following is true of microbes? a. ninety-nine percent of all microbes are pathogenic. b. gene expression in bacteria is very similar to gene expression in humans, which facilitates the use of bacteria in recombinant biotechnology and gene therapy. c. all bacterial enzymes are harmful to humans and the environment. d. microbes create pollutants and toxins that harm the environment.

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil

Which of the following do all living things have in common