Biology
Nephron is related to which of the following system of human body?

Excretory system
Reproductive system
Circulatory system
Respiratory system

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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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