Is speak ab irregular verb​

In all living cells dna controls cellular activities by

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?