Which enzymes are used by genetic engineers to cut the circular chromosome of bacteria into smaller segments?

a. construction
b. primer
c. residual
d. restriction

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 were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

Brainliest ! is slowing down a car an example of acceleration? explain. - explain correctly