Biology
Which of the following is a work done by the placenta tissue in humans?

Support the embryo
Removes waste matter from the embryo and provide nutrition to the embryo
Remove waste matter from the embryo
Provide nutrition to the embryo

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Biology
The main function of the inner bark of a woody plant is to

Protect the plant from herbivorous animals
Transport food from the leaves to the other parts of the plant
Transport minerals and water from the roots to the leaves
Act as a membrane impermeable to water and gas

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