Answer: He grew a willow tree in a weighed amount of soil. After five years, he discovered that the willow tree weighed about 74 kg more than it did at the start. As the weight of the soil had hardly changed, van Helmont concluded that plant growth cannot only be due to minerals from the soil.
Answer:
The answers is divison and growth of cells
Explanation:
The brain's outermost cellular layer is called the cortex.
<span>ensuring that the endotracheal tube is secure</span>
I'm pretty sure it's primary growth. I might not have studied this type of biology yet, but secondary growth would definitely not be the answer.<span />
