What is the definition of cranial

Hurry which of these is true about index fossils? a) are very scarcely found b) used as guides in relative dating c) found in the youngest layer of the rock d) used as reference points in absolute dating

Which of the following produces carbon dioxide? a. plants b. animals c. decomposers d. all of the above

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content