In an Attempt to Determine the Source of a Growing

question 60

Multiple Choice

In an attempt to determine the source of a growing plant's mass, van Helmont planted a willow seedling in a pot of soil. After five years, the willow weighed 76.8 kg, and the soil had lost 0.06 kg of weight. Only water had been added to the pot. Which of the following conclusions should van Helmont have drawn?

• A)Plants get their mass from water.
• B)Plants get their mass from water and air.
• C)Plants get their mass from water and atmospheric CO₂.
• D)Plants get all or almost all of their mass from a source other than soil.

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Definitions:

Hunger-Arousing

Refers to stimuli or circumstances that trigger the biological and psychological state of feeling the need to eat.

Secreted by the Stomach

Refers to substances like acids, enzymes, or hormones produced and released by the stomach to aid in digestion and other bodily functions.

Motivated to Eat

The drive or urge to consume food, often influenced by physiological hunger, psychological factors, or environmental cues.

Neural Areas

Specific regions within the brain that are responsible for processing various types of cognitive and physiological functions.