A Barometer Measures

question 75

Multiple Choice

A barometer measures

• A)the pressure of a gas sample in a container.
• B)the difference in pressure between two gas samples.
• C)the difference in pressure between a gas sample and atmospheric pressure.
• D)atmospheric pressure.
• E)the pressure of an ideal gas.

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Definitions:

Flagellated Cells

Cells possessing one or more flagella, which are long, whip-like structures that can propel the cells through liquid environments.

Red Algae

A large group of algae known for their reddish color, which is caused by phycoerythrin; they are mostly marine and play a role in coral reef ecosystems.

Serial Endosymbiosis Hypothesis

A theory suggesting that the organelles of eukaryotic cells, such as mitochondria and chloroplasts, originated as symbiotic relationships between separate prokaryotic organisms.

Purple Bacteria

A group of photosynthetic bacteria that utilize bacteriochlorophyll for energy, contributing to the sulfur cycle in some aquatic environments.