Air Transport Is Characterized by Low Fixed and High Variable

question 19

True/False

Air transport is characterized by low fixed and high variable cost.

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Definitions:

Chorion

Extraembryonic membrane functioning for respiratory exchange in birds and reptiles; contributes to placenta formation in mammals.

Allantois

Extraembryonic membrane that accumulates nitrogenous wastes in the eggs of reptiles, including birds; contributes to the formation of umbilical blood vessels in mammals.

Umbilical Blood Vessels

The blood vessels in the umbilical cord that connect the fetus to the placenta, allowing nutrient uptake, waste elimination, and gas exchange via the mother's blood supply.

Insulator

A material or device that prevents the passage of heat, electricity, or sound.