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Chapter 31: Q 17. (page 887)

Research the life of Jan Babtista van Helmont. What did the van Helmont experiment show?

Short Answer

Expert verified

Plant gains weight due to intake of water.

Step by step solution

01

Step-1 Introduction

Jan Baptista van Helmont was a Dutch physiologist as well as a chemist. He was born in 1580 and he was the founder of pneumatic chemistry. He introduced the term 鈥榞as鈥� into science.

02

Step-2 Explanation

Helmont experimented on a willow tree which is considered as one of the earliest quantitative experimental studies on plant growth and nutrition in the history of biology.

Helmont grew a tree named Willow tree and he measured the weight of the tree and the amount of soil. After four to five years, he again measured the weight of the tree and found that the weight has increased but the amount of soil is still the same.

Hence, he showed that plants do not consume soil to grow and gain weight, which is correct. He also suggested that plant growth and weight gain are due to the intake of water.

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Most popular questions from this chapter

For an element to be regarded as essential, all of the following criteria must be met, except:

a. No other element can perform the function.

b. The element is directly involved in plant nutrition.

c. The element is inorganic.

d. The plant cannot complete its life cycle without the element.

Farmers often rotate corn (a cereal crop) and soybeans (a legume), planting a field with each crop in alternate seasons. What advantage might this crop rotation confer?

What is the term used to describe the solid rock that lies beneath the soil?

a. sand

b. bedrock

c. clay

d. loam

Why is biological nitrogen fixation an environmentally friendly way of fertilizing plants?

The nutrient that is part of carbohydrates, proteins, and nucleic acids, and that forms biomolecules, is ________.

a. nitrogen

b. carbon

c. magnesium

d. iron
See all solutions

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