Which of the following is NOT a main fingerprint pattern?

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Prepare for the PLTW Biomedical Science Test. Study with flashcards and multiple choice questions, each question comes with hints and explanations. Get ready for your exam!

Multiple Choice

Which of the following is NOT a main fingerprint pattern?

Explanation:
Fingerprint patterns are categorized into three main types: arches, loops, and whorls. A delta is a ridge feature—a triangular point where ridges diverge or converge—that occurs within loops or whorls, but it is not a primary pattern type itself. Because of that, delta is not one of the main patterns. So, the correct answer is the delta. Arches, loops, and whorls are all recognized as the primary pattern classes, each with its own characteristic ridge flow, while deltas describe a specific ridge arrangement within those patterns.

Fingerprint patterns are categorized into three main types: arches, loops, and whorls. A delta is a ridge feature—a triangular point where ridges diverge or converge—that occurs within loops or whorls, but it is not a primary pattern type itself. Because of that, delta is not one of the main patterns. So, the correct answer is the delta. Arches, loops, and whorls are all recognized as the primary pattern classes, each with its own characteristic ridge flow, while deltas describe a specific ridge arrangement within those patterns.

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