Biology: Concepts and Investigations
5th Edition
ISBN: 9781260542202
Author: Marielle Hoefnagels
Publisher: Mcgraw-hill Higher Education (us)
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Chapter 23, Problem 12WIO
Summary Introduction
To determine:
The other source that Jean Baptista Van Helmont failed to consider in his experiment about how plant acquire new mass as they grow when he added nothing but only water to plants.
Concept introduction:
Nutrient uptake is the process by which nutrients from external environment move into a plant. Plants obtain their nutrients from soil and air. Soil provides food, water, and nutrients to plants which are very essential for plant growth and development. Plants also obtain some essential nutrients from the atmosphere by the leaves.
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In the early 1600s, Jean Baptista van Helmont investigated how plantsacquire new mass as they grow. He weighed a willow shoot andplanted it into soil that he had also weighed. After 5 years of addingnothing but water to the plant, he found that the soil had lost only alittle weight, while the plant had grown from 2 kg to about 76 kg. Hetherefore concluded, incorrectly, that water was the sole source of theadded plant material. What other source did he fail to consider in hisexperiment?
About 200 years ago, Jan Batista van Helmont wanted to know where growing plants get the materials necessary for increase in size. He planted a tree seedling weighing 2.2 kilograms (5 pounds) in a barrel filled with 90 kilograms (200 pounds) of soil and then watered the tree regularly. After 5 years, the tree had gained almost 75 kilograms (164 pounds), and the soils weight was unchanged. He incorrectly concluded that the tree had gained all of its additional weight by absorbing water. How did the tree really gain most of its weight?
What is the conclusion of the Experiment on Absoprtion of Water by Roots?
A. Cup 1 - with half water and the lid is tightly close to ensure the evaporation of water.
B. Cup 2 - with half water and few drops of oil while the plant sample's roots are immersed.
C. Cup 3 - with half water and drops of ink while another plant sample's roots are immersed.
D. Cup 4 - with plant sample but the roots do not reach the water.
Chapter 23 Solutions
Biology: Concepts and Investigations
Ch. 23.1 - How do plants acquire C, H, O, N, and P?Ch. 23.1 - Prob. 2MCCh. 23.1 - Prob. 3MCCh. 23.2 - Prob. 1MCCh. 23.2 - Prob. 2MCCh. 23.2 - Prob. 3MCCh. 23.3 - Prob. 1MCCh. 23.3 - Prob. 2MCCh. 23.3 - Prob. 3MCCh. 23.4 - Prob. 1MC
Ch. 23.4 - Prob. 2MCCh. 23.5 - Prob. 1MCCh. 23.5 - Prob. 2MCCh. 23.5 - Prob. 3MCCh. 23 - Prob. 1MCQCh. 23 - Prob. 2MCQCh. 23 - Prob. 3MCQCh. 23 - Prob. 4MCQCh. 23 - Prob. 5MCQCh. 23 - Prob. 6MCQCh. 23 - Prob. 7MCQCh. 23 - Explain the relationship between transpiration and...Ch. 23 - Prob. 2WIOCh. 23 - Prob. 3WIOCh. 23 - Prob. 4WIOCh. 23 - Prob. 5WIOCh. 23 - Prob. 6WIOCh. 23 - Prob. 7WIOCh. 23 - Prob. 8WIOCh. 23 - Prob. 9WIOCh. 23 - Prob. 10WIOCh. 23 - Prob. 11WIOCh. 23 - Prob. 12WIOCh. 23 - Prob. 13WIOCh. 23 - Prob. 1PITCh. 23 - Prob. 2PITCh. 23 - Prob. 3PIT
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