In mammals the powerful muscle that aids in breathing is the a. diaphragm. b. kidney. c. cerebrum. d. placenta.

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

How does a lytic infection differ from a lysogenic infection?

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules