Answer:Algae play significant roles as producers in aquatic ecosystems. Microscopic forms live suspended in the water column. They are the main component of phytoplankton. As such, they contribute to the food base of most marine ecosystems.
Explanation:
Answer:
False
Explanation:
John Brown did this, not John C. Breckinridge
C. They summarize conclusions about primary sources would be the best option, because these sources differ from primary sources in that they are not first-hand accounts.
Most manufacturers require oil changes at 3ooo, answer D.