When China Builds a Dam Using Few Machines and a Great

question 397

Multiple Choice

When China builds a dam using few machines and a great deal of labor, it is answering the ________ part of one of the two big economic questions.

• A) "what"
• B) "how"
• C) "where"
• D) "for whom"

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Definitions:

Cohesion-tension

A hypothesis that explains the process of water movement up plants due to water molecules' cohesive and adhesive properties and the evaporation of water from the leaves.

Xylem

the vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem.

Transpiration

Plant’s loss of water to the atmosphere, mainly through evaporation at leaf stomata.

Petioles

The stalks that join a leaf to the stem of a plant.