Suppose You Explored a New Planet and Found a Photosynthetic

question 27

Multiple Choice

Suppose you explored a new planet and found a photosynthetic organism unlike any on Earth. Also suppose that you repeat Engelmann's classic experiment using this new organism in place of Spirogyra and find that oxygen-dependent bacteria cluster near the green and yellow portions of the spectrum. Which statement summarizes what you have learned?

• A)This organism is green, just like plants on Earth.
• B)This organism utilizes the most energy-rich photons of the spectrum.
• C)The Sun of this new planet emits different wavelengths of light than those emitted by Earth's Sun.
• D)This new organism is using yellow and green light to drive photosynthesis.

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Definitions:

Fluorescence

The emission of light by a substance that has absorbed light or other electromagnetic radiation, often used in scientific and medical applications.

Cholecystography

An X-ray exam that helps visualize the gallbladder to diagnose problems such as gallstones.

Cholecystogram

A cholecystogram is a diagnostic imaging test that uses X-rays to visualize the gallbladder, often to detect gallstones or other gallbladder disorders.

Cholecystectomy

A medical operation to excise the gallbladder.