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Science

Asked: Jun 22nd, 2015

Question Description

If the number of photosynthetic organisms on the earth decreased drastically, which would happen as a result?

Less water would be available on the earth’s surface.

Less solar energy would reach the earth’s atmosphere.

More oxygen gas would be found in the atmosphere.

More carbon dioxide gas would be found in the atmosphere.

Which statement best describes the relationship of photosynthesis and energy?

The process of photosynthesis is energy-storing because the process converts light energy into chemical energy, which is stored in the bonds of glucose.

The process of photosynthesis is energy-releasing because the process converts light energy into free energy that can be used for cell functions.

The process of photosynthesis is energy-conserving because no energy is used throughout the process of forming glucose and oxygen molecules.

The process of photosynthesis is energy-wasting because photosynthesis is an inefficient process that depletes the cell of energy stored in the bonds of glucose.

Which statement best describes what a thylakoid does during photosynthesis?

surrounds the grana and keeps them moist

enables the light-dependent reactions to occur

combines carbon dioxide and water to make sugar

helps the light-independent reactions to occur

A scientist hypothesized that oxygen atoms from both carbon dioxide and water are used to make glucose during photosynthesis. However, experimental results using oxygen isotopes showed that all of the oxygen from the water ended up in the oxygen molecules that were produced. None of the oxygen from water was found in glucose.

What should the scientist do to best gain scientific understanding of this topic?

Analyze what could have happened, and change the experimental methods to retest the hypotheses in a different way.

Discard the faulty results that do not support the original hypothesis, and repeat the experiment using the same methods.

Analyze the procedural errors that took place in the experiment, and summarize these in a conclusion statement.

Repeat the experiment and adjust new data to support the original hypothesis.

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