What makes a fossil an index fossil
2 answers:
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<h2><u>Answer:</u></h2>
- - Phytoplanktons are the marine creations of the autotrophic plants found on the surface of the Earth.
- - Just like the plants on the surface of the Earth, phytoplanktons also take in carbon dioxide & give out oxygen by absorbing sublight & conducting the process of photosynthesis.
- They also form the base of the marine food-chain just like the terrestrial autotrophic plants.
- - <u>Phytoplanktons are found to be largely located in the surface of oceans near to the coastlines, higher altitudes, or near to the equator. </u>
- - This is because phytoplanktons need a lot of nutrients to survive & hence live near to the surface of oceans to get enough sunlight which helps in photosynthesis.
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