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Foraminiferans - Protozoan
Foraminiferans are largely benthic marine species. They have multi chambered calcareous tests or shells with numerous pores, hence the name foraminifera or pore bearer. A single large opening allows the cytoplasm to protrude out. The chalk cliffs of Dover England are formed from deep sediments of foraminiferan shells.
Figure: Various types of foraminiferan shells formed chiefly of calcium carbonate. A fossil species -Nummulites is an important contributor to the great limestone deposits in certain parts of the world.
How does the placement of veins help to carry out their function of transporting materials to and from the leaf ?
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