What Allowed Human and Animal Migration to Occur from Asia

question 37

Multiple Choice

What allowed human and animal migration to occur from Asia to North America?

• A)a warm spell called the Bölling-Alleröd period
• B)the Eemian interglacial period
• C)​retreat of continental glaciers
• D)​the Bering land bridge
• E)​melting of the polar ice caps

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Definitions:

Joint Preparation

The process of preparing the edges of material pieces that are to be joined together, often by welding, to ensure a strong and clean join.

Root Reinforcement

A reinforcement technique used to strengthen the area near the root of a weld, ensuring enhanced durability and support.

Melt-Through Symbol

A welding symbol used to indicate where complete joint penetration is required in a weld, ensuring that the weld metal fully penetrates the joint.

Bevel-Groove

A type of weld preparation where the edges of the parts to be joined are cut at an angle to accommodate a filler material.