Multiple Choice
Why do our cells need energy?
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7. Energy and Metabolism
Introduction to Energy
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What type of energy transformation occurs when a rabbit eats grass?
A
Mechanical energy in grass is converted to thermal energy in the rabbit.
B
Thermal energy in grass is converted to chemical energy in the rabbit.
C
Light energy in grass is converted to electrical energy in the rabbit.
D
Chemical energy in grass is converted to mechanical energy in the rabbit.
Verified step by step guidance1
Begin by understanding the process of energy transformation in living organisms. When a rabbit eats grass, it is consuming the stored energy within the grass.
Recognize that grass, like all plants, stores energy in the form of chemical energy through the process of photosynthesis. This energy is stored in the chemical bonds of molecules such as glucose.
When the rabbit consumes the grass, it digests the plant material, breaking down the chemical bonds and releasing the stored chemical energy.
This released chemical energy is then used by the rabbit's cells to perform various functions, including movement. The energy is transformed into mechanical energy, which powers the rabbit's muscles.
Thus, the correct energy transformation is from chemical energy in the grass to mechanical energy in the rabbit, enabling the rabbit to move and perform physical activities.
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