Answer:
Phytoplankton use carbon dioxide and produce oxygen during photosynthesis; phytoplankton, fish, and seals use oxygen and produce carbon dioxide during respiration. Which can provide the most energy in an ecosystem
Explanation:
Answer:
the answer to this is A. true
A group of organ systems working together is an organism.
Answer:
a mineral is scraped or rubbed hardly on sandpaper or unglazed porcelain
( please mark me as brainliest that would be most appreiciated )