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List two things phytoplankton need to survive. Name at least two special adaptations phytoplankton have to stay in the photic zone.

User Kevin Choi
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The two basic things that phytoplankton need to survive is :
- Water
- Sun light

Two special adaptations phytoplankon have to stay in the Photic zone is :
- Projections, which increase their surface are and make them light weighted
- Flagella, to move towards the area that have more sun light

hope this helps