Vital Improvements in Railroading in the Late Nineteenth Century Included

question 100

Multiple Choice

Vital improvements in railroading in the late nineteenth century included

• A) standard gauge of track width.
• B) air brakes.
• C) steel rails.
• D) Pullman cars.
• E) the block signal.

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Definitions:

Photosynthesize

The process by which green plants, algae, and certain bacteria convert light energy into chemical energy, producing oxygen as a byproduct.

Grana

Stacks of thylakoids in the chloroplasts of plant cells, where photosynthesis takes place.

Autotrophs

Organisms capable of producing their own food from inorganic substances using light or chemical energy, such as plants and some bacteria.

Autotroph

Organisms that produce their own food from inorganic substances using light or chemical energy, such as plants and certain bacteria.