How are managers in a command economy different from those in a market economy?
O In a command economy, they have incentive to improve efficiency and productivity.
O In a market economy, they have incentive to improve efficiency and productivity.
O In both economies, they have incentive to improve effieciency and productivity.
O In both economies, they have no incentive to improve efficiency and productivity.

The body is protected against harmful flu viruses by

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

How do cells grow and reproduce to maintain homeostasis?