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Explain why many animals have a heart and circulation (mass
transport to overcome limitations of diffusion in meeting the
requirements of organisms).

Explain the importance of water as a solvent in transport,
including its dipole nature.…

Page 2

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3 Distinguish between monosaccharides, disaccharides
and polysaccharides (glycogen and starch ­ amylose and
amylopectin) and relate their structures to their roles in
providing and storing energy (-glucose and cellulose are not
required in this topic).

4 Describe how monosaccharides join to form disaccharides
(sucrose, lactose and maltose) and polysaccharides


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