What is the independent variable in the experiment? A the type of soil each plant was grown in с the amount of water lost the humidity the plants are grown in the amount of water given to each plant

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Under controlled conditions, a transpiration experiment was conducted using two different plant species, A and B. Each plant species was exposed to a low-humidity environment and a high-humidity environment, with all other conditions kept the same. The transpiration rate was measured over a period of one hour. The data was graphed as shown below.

**Graph Description:**
The bar graph displays the transpiration rates of two plant species—Species A and Species B—under different humidity conditions. The y-axis represents the transpiration rate (µl/cm²/min), and the x-axis displays two humidity conditions: low humidity (40%) and high humidity (80%). Each condition has two bars:

- **Low Humidity (40%):** Species A shows a higher transpiration rate compared to Species B.
- **High Humidity (80%):** Both Species A and Species B have similar transpiration rates, which are lower than in low humidity.

**Caption:** 
A bar graph of the transpiration rates of two plants under different humidity conditions.

**Question:**
What is the independent variable in the experiment?

A □  the type of soil each plant was grown in  
B □  the amount of water lost    
C □  the humidity the plants are grown in   
D □  the amount of water given to each plant
Transcribed Image Text:Under controlled conditions, a transpiration experiment was conducted using two different plant species, A and B. Each plant species was exposed to a low-humidity environment and a high-humidity environment, with all other conditions kept the same. The transpiration rate was measured over a period of one hour. The data was graphed as shown below. **Graph Description:** The bar graph displays the transpiration rates of two plant species—Species A and Species B—under different humidity conditions. The y-axis represents the transpiration rate (µl/cm²/min), and the x-axis displays two humidity conditions: low humidity (40%) and high humidity (80%). Each condition has two bars: - **Low Humidity (40%):** Species A shows a higher transpiration rate compared to Species B. - **High Humidity (80%):** Both Species A and Species B have similar transpiration rates, which are lower than in low humidity. **Caption:** A bar graph of the transpiration rates of two plants under different humidity conditions. **Question:** What is the independent variable in the experiment? A □ the type of soil each plant was grown in B □ the amount of water lost C □ the humidity the plants are grown in D □ the amount of water given to each plant
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