Textbook Question
In a defined medium, ________.
a. The exact chemical composition of the medium is known
b. Agar is available for microbial nutrition
c. Blood may be included
d. Organic chemicals are excluded
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10. Dynamics of Microbial Growth
Nutritional Factors of Microbial Growth
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
The prefix photo- indicates that an organism will make use of _______ for energy purposes.
A
Chemicals.
B
Organics.
C
Light.
D
Inorganics
Verified step by step guidance1
Understand the prefix 'photo-': In microbiology, the prefix 'photo-' is derived from the Greek word 'phōs,' meaning light. It indicates that the organism uses light as a source of energy.
Identify the types of energy sources: Organisms can utilize different sources for energy, including light, chemicals, organics, and inorganics.
Differentiate between phototrophs and chemotrophs: Phototrophs use light as their energy source, while chemotrophs rely on chemical compounds.
Consider examples of phototrophic organisms: Many plants, algae, and certain bacteria are phototrophs, using light to drive photosynthesis.
Conclude the correct answer: Based on the prefix 'photo-', the organism uses light for energy purposes, distinguishing it from organisms that use chemicals, organics, or inorganics.
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