Which statement supports the hypothesis that life has changed over time? a. prokaryotic cells lack both a nucleus and membrane-bound organelles. b. fossils of some ancient organisms differ from modern forms of life. c. organisms differ from one part of the world to another. d. the atmosphere of the early earth was different from today’s atmosphere.

The observations of hooke and van leeuwenhoek documenting the existence of microscopic cells formed the basis of what important theory? a. the cell theory stating that all living things are composed of cellsb. the theory of spontaneous generation, which held that life forms could arise spontaneouslyc. the theory of chemotherapy, or use of antimicrobials to destroy pathogenic organismsd. the germ theory of disease and causative agents

Which of the following requires the use of energy and the of transport proteins to move a molecule across a cell membrane?

Aquantity of gas has a volume of 18 m3 and an absolute temperature of 225 k. when the temperature of the gas is raised to 380 k, what is the new volume of the gas? (assume that there’s no change in pressure.)