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nignag [31]
3 years ago
10

What controls the direction of a molecule, such as oxygen, involved in passive transport?

Biology
1 answer:
Grace [21]3 years ago
4 0
The nucleaus controls everything within cells

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IgD is found on the surface of lymphocytes and is activated upon contact with antigens.

IgG forms part of the secondary response to antigen and is also responsible for newborn protection.

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