Which two characteristics describe a good index fossil? A. Having existed for a very long time
B. Being very rare
C. Being found in many regions
D. Having an unusual shape

Drag each tile to the correct box. match the given symbol or molecular formula to the term that best describes it. element -organic compound -inorganic elemental molecule -inorganic compound -answers given: so2, k, ci2, c6h6

Hemoglobin is a proton that carries oxygen around the body what is hemoglobin made from

Which of the following describes the difference in stimuli required to detect a difference between the stimuli? a. just noticeableb. signal detectionc. subliminald. top down