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k0ka [10]
3 years ago
15

Jan van Helmont concludes that plants gain most of their mass from

Biology
2 answers:
scoray [572]3 years ago
7 0

Water

Hope this helps :)

lutik1710 [3]3 years ago
5 0

The prevailing theory at the time was that plants grew by eating soil, and van Helmont devised a clever investigation to test this idea. He weighed a willow tree and weighed dry soil. He planted the tree, watered it and then left it for 5 years. He then re-weighed the tree, which had increased in mass by over 12 stone. He dried the soil and weighed it, showing that the soil was almost the same mass. He concluded that the tree grew by drinking water.

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The connection between the hypothalamus and the hypophysis enables the nervous system to control the hormone levels of all of the major endocrine glands in the body.
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