What is one definition feature of a prokaryotic cell? 1-have a cell wall plasma membrane 2- cytoplasm surrounds organelles 3- organelles are not membrane- bound 4- membrane- bound organelles

the right answer for k12 is number 3
organelles are not membrane- bound

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

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

What is the inability of an individual or a society to achieve a minimum standard of living known as ?