Calcareous Nannoplanktons Quiz

Fossil remains of land plants that live in oceans

Fossil remains of single-celled algae that live in oceans (correct)

Fossil remains of deep-sea corals

Fossil remains of marine animals that float near the ocean surface

Because they form high proportion of carbonate in the sediments

Due to their rapid rate of evolution and wide geographic distribution (correct)

Because they have been living in the world's oceans for at least 200 million years

Because they are the largest producers of calcium carbonate

Upper 200 m of the oceans (correct)

Shallow coastal waters

Deep sea

Freshwater lakes

<p>They form high proportion of carbonate in the sediments</p> Signup and view all the answers

<p>Chrysophyte algae</p> Signup and view all the answers