The membrane is selectively permeable because substances do not cross it indiscriminately. Some molecules, such as hydrocarbons and oxygen can cross the membrane. Many large molecules (such as glucose and other sugars) cannot. Water can pass through between the lipids.
Seaweed is a type of algae.
Explanation: Seaweeds are a group of photoautotrophic, multi-cellular algae occurring in marine environments.
Http://www.indiana.edu/~geol105/images/gaia_chapter_3/wegener.htm
read this
There would be more Carbon Dioxide because plants use CO2 when they go through photosynthesis.