1. which of these describes the levels of organization
of an animal?
a. tissues are composed of organs, which are
composed of cells.
b. organs are composed of cells, which are
composed of tissues.
c. organs are composed of tissues, which are
composed of cells.
). tissues are composed of cells, which are
composed of organs.

What mistake did john needham make that caused him to conclude that spontaneous generation for microorganisms occurred? a. he re-contaminated his boiled broth solutions. b. he destroyed the vital force in the solutions. c. he did not boil his broth solutions, only warmed them. d. he failed to seal his flasks of boiled broth. e. he allowed his assistant to conduct the experiment which he did not monitor closely.