A stoma is an artificially created:

The major disadvantage of having live plants in a reception area is that they ________.

A. release harmful toxins into the environment B. may cause allergies or be poisonous if eaten by small children C. take up space and can spill D. must be watered periodically E. require someone in the office to know how to grow plants

The root operation _____ is only used for making a new structure.

A. ablation B. creation C. fusion D. replacement