Why are phytoplankton so important to the cycling of oxygen? Phytoplankton absorb more oxygen than they release.

Phytoplankton store oxygen in their bodies.

Phytoplankton are key to keeping oxygen and carbon dioxide levels balanced.

Phytoplankton convert oxygen into carbon dioxide.

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

This is so important ugh its 25 points

How can you tell the difference between rough er from smooth er?