Extinction occurs when a is no longer paired with a

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

Which zone within the open-ocean zone is home to the most organisms? deep zone surface zone intertidal zone transition zone

Drag each description to the correct location on the image. not all descriptions will be used. describe the parts of a comet. the frozen part of the comet the atmosphere of gases and dust formed when the nucleus vaporizes tail made of small, solid dust particles tail made of ions that appears to point away from the comet's orbit