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Exam (elaborations)

USABO Open EXAM STUDY GUIDE 2025/2026 COMPLETE QUESTIONS WITH VERIFIED CORRECT ANSWERS/ 100% GUARANTEED PASS
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January 2026

2025/2026

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USABO Open EXAM STUDY GUIDE 2025/2026 COMPLETE QUESTIONS WITH VERIFIED CORRECT ANSWERS/ 100% GUARANTEED PASS 1. What binding partner do integrins require in the extracellular matrix of an animal cell? - ANSWER Integrins would most likely require firm attachment to Actin. 2. Which molecular motor protein is involved in the contractile ring during cytokinesis? - ANSWER Myosin. 3. What is the ratio of the concentration of protonated to deprotonated forms of an acid with a pKa of 4.76 in a ...
Tutorpatrick
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Exam (elaborations)

USABO OPEN EXAM NEWEST 2025 ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED ANSWERS
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48

January 2026

2025/2026

A+
USABO OPEN EXAM NEWEST 2025 ACTUAL EXAM COMPLETE 150 QUESTIONS AND CORRECT DETAILED ANSWERS
POLYCARP
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Exam (elaborations)

USABO OPEN EXAM STUDY GUIDE 2026/2027 ACCURATE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS <NEWEST VERSION>
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158

December 2025

2025/2026

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USABO OPEN EXAM STUDY GUIDE 2026/2027 ACCURATE QUESTIONS WITH CORRECT DETAILED ANSWERS || 100% GUARANTEED PASS <NEWEST VERSION> 1. Integrins - ANSWER Cell surface receptors for extracellular matrix proteins. 2. Actin - ANSWER Protein involved in cell motility and muscle contraction. 3. Myosin - ANSWER Motor protein involved in muscle contraction and cytokinesis. 4. Dynein - ANSWER Motor protein involved in intracellular transport and ciliary/flagellar movement...
ProfBenjamin
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Exam (elaborations)

: USABO Open Exam 2025/2026 — Questions and Answers (Complete Solutions)
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November 2025

2025/2026

A+
This document provides the complete set of verified questions and answers for the USABO (USA Biology Olympiad) Open Exam for the 2025/2026 competition cycle. It covers all core biology domains tested in the Open Exam, including cell biology, genetics, molecular biology, physiology, evolution, ecology, plant biology, and biochemistry. Designed for high-achieving students preparing for Olympiad-level assessments, this resource supports mastery of advanced biological concepts and mirrors the depth ...
TutorAgness
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Exam (elaborations)

USABO OPEN EXAM NEWEST 2003/2026 ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALL ANSWERED {30 Q & A} ALREADY GRADED A+ | BRAND NEW! | 100% GUARANTEED PASS
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November 2025

2025/2026

A+
USABO OPEN EXAM NEWEST 2003/2026 ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS (VERIFIED ANSWERS) ALL ANSWERED {30 Q & A} ALREADY GRADED A+ | BRAND NEW! | 100% GUARANTEED PASS Which of the following is NOT a characteristic of all chordates? [ ] A. notochord [ ] B. vertebrae [ ] C. pharyngeal slits [ ] D. postanal tail - Correct Answer > B
Starshine1
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Exam (elaborations)

USABO Open Exam Questions And Answers Verified 100% Correct
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November 2025

2025/2026

A+
USABO Open Exam Questions And Answers Verified 100% Correct If one were to follow the path of a human erythrocyte starting from an artery that leads to the duodenum, the erythrocyte will most likely pass through ___ capillary beds before reaching the right ventricle of the heart. A. 1 B. 2 C. 3 D. 4 E. 5 - ANSWER -D. 4 While conducting research on Euglena, a researcher observed that the contractile vacuole ceased functioning yet the rest of the organism seemed hea...
TopGradeGuru
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Exam (elaborations)

USABO Open Exam Study Guide Questions And Answers Verified 100% Correct
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November 2025

2025/2026

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USABO Open Exam Study Guide Questions And Answers Verified 100% Correct During migrations, some birds use which of the following as reference frameworks? I. The sun II. Constellations III. Earth's magnetic field [ ] A. I only [ ] B. I and II only [ ] C. I and III only [ ] D. I, II, and III - ANSWER -D Generally, there are more species per square kilometer in which of the following types of ecosystem? [ ] A. Temperate grassland [ ] B. Arctic tun...
TopGradeGuru
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Exam (elaborations)

USABO Open Exam Questions And Answers Verified 100% Correct
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November 2025

2025/2026

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USABO Open Exam Questions And Answers Verified 100% Correct Which of the following statements about alternation of generations in land plants is TRUE? A. The gametophyte produces haploid cells by meiosis. B. In nonvascular plants (Bryophyta), the gametophyte stage is dominant. C. The sporophyte produces diploid spores that later undergo meiosis. D. The gametophyte stage is diploid. E. (A) and (D) are BOTH true. - ANSWER -B. In nonvascular plants (Bryophyta), the gametoph...
TheExamMaestro
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