If a photosynthetic organism is illuminated in a closed, sealed environment, it is observed that the CO2CO2 and O2O2 levels in the surrounding atmosphere reach a constant ratio. Part A Suggest an explanation. Match the words in the left column to the appropriate blanks in the sentences on the right.

The blue particles in this image are able to cross the cell membrane through simple diffusion. how will they be transported? outside the cell inside the cell o a. the substances will move directly across the membrane from outside the cell to inside the cell. b. the substances will move through channels in the membrane proteins from outside the cell to inside the cell. o c. the substances will move through channels in the membrane proteins from inside the cell to outside the cell. o d. the substances will move directly across the membrane from inside the cell to outside the cell.

As a result of climate change earths temperature is rising and sea ice is melting what is a likely effect? answer : populations of walruses and polar bears will decline

How many electrons can occupy any electron orbital?