Home
Search
Create
Library
Topics
Student
Teacher
Admin
Map
Sign in for more features
YourStory
Home
Search
Create
Library
Topics
Student
Teacher
Sign in
Feedback
Contact Us!
Assessment
What is the main role of phytoplankton in marine ecosystems?
They produce oxygen through photosynthesis.
They feed on organic waste.
They form complex reefs.
They are the primary consumers.
Which of the following is a major threat to marine biodiversity?
Overfishing
Increased biodiversity
Natural climate variations
Pollination
Which of the following describes a marine biome?
The desert
The tundra
The coral reef
The rainforest
Submit