Which of the following behaviors requires help from the nervous system? A. sensing heat B. swallowing food C. driving a car D. all of these

Disinfection of impression materials is usually accomplished by a. sterilization with high heat. b. spray or immersion in a chemical disinfectant. c. sterilization with steam under pressure. d. allowing the impression to sit 24 hours in water until all the organisms die.

What noticeable trend from this graph might be used to make a conclusion?

The cluster of developing cells from conception until birth is called an