A ____ Is a Tapered Hole with a Wide Outer

question 26

Multiple Choice

A ____ is a tapered hole with a wide outer portion that allows the screw to sit flush with or below the surface of the surrounding material.

• A) counterbore
• B) countersink
• C) plug
• D) plug cutter

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Definitions:

Keystone Species

An organism that other species in an ecosystem significantly rely on, and if it were eliminated, the ecosystem would undergo major changes.

Sea Stars

Marine invertebrates known for their star shape and ability to regenerate limbs, part of the echinoderm family.

Dung Beetles

Beetles that feed on feces, playing important ecological roles such as nutrient recycling and soil aeration.

Keystone Species

Species that have a disproportionately large impact on their environment relative to their abundance, crucial for ecosystem structure and function.