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Difficulty: EasyIdentifying Hypotheses and Beliefs

Two students propose hypotheses to explain the primary energy source for deep-sea hydrothermal vent ecosystems.

Student 1
The primary energy source for these ecosystems is geothermal heat emitted directly from the vents. Organisms in these environments have adapted to absorb this heat energy directly to power their metabolic processes.

Student 2
The primary energy source is chemical energy from dissolved compounds, such as hydrogen sulfide (H2SH_2S), present in the vent fluids. Specialized bacteria use chemosynthesis to convert these chemicals into organic matter, which forms the base of the food web.

Based on these hypotheses, evaluate the truth of the following statement: Student 2 believes that geothermal heat is absorbed directly by organisms as their primary energy source.

Answer: Answer

Answer

False
The statement is false because Student 2 hypothesizes that chemical energy from compounds such as hydrogen sulfide, converted by bacteria, is the primary energy source, whereas Student 1 is the one who proposes direct geothermal heat absorption.

Step-by-Step Solution

1
Identify Student 2's hypothesis regarding the primary energy source.
Student 2 states that the primary energy source is chemical energy from dissolved compounds like hydrogen sulfide (H2SH_2S), which bacteria convert to organic matter.
To determine what Student 2 believes is the source of energy and how it is utilized.
2
Compare Student 2's hypothesis with the statement in the question.
The statement claims that Student 2 believes geothermal heat is absorbed directly. Student 2 actually proposes chemical energy and bacterial conversion, while Student 1 is the one who proposes geothermal heat absorption.
To evaluate if the statement accurately reflects Student 2's belief.

Key Concept

Identifying Hypotheses and Beliefs
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Topics

Identifying Hypotheses and Beliefs

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