IB DP Biology Mock Exam HL Paper 1A Set 4 - 2025 Syllabus
IB DP Biology Mock Exam HL Paper 1A Set 4
Prepare for the IB DP Biology Exam with our comprehensive IB DP Biology Exam Mock Exam HL Paper 1A Set 4. Test your knowledge and understanding of key concepts with challenging questions covering all essential topics. Identify areas for improvement and boost your confidence for the real exam
Question
Huntington’s disease is an autosomal dominant genetic disease. What are the chances of
two parents that are heterozygous for the gene having a child with Huntington’s disease?
A. 25%
B. 50%
C. 75%
D. 100%
Answer/Explanation
Ans: C
Question
The table contains information about the diet of some animals.
| Animal | Diet |
| Snakes | Mice |
| Eagles | Snakes |
| Mice | Seeds |
Which pyramid of energy represents this information?
Answer/Explanation
Question
The diagram shows a simplified carbon cycle.
Which processes are taking place at X and Y?
Answer/Explanation
Question
What is a potential consequence of the rise in global temperatures?
A. Increased exposure to UV light due to ozone depletion
B. Increase in ocean pH threatening the survival of marine organisms that require
calcium carbonate
C. Decrease in the number and severity of storms due to the increased evaporation
D. Changes to circulating ocean currents
Answer/Explanation
Question
A cloning method used for livestock involves in vitro fertilization (IVF) with selected male and
female gametes. The diagram shows the steps followed after in vitro fertilization.
What does X represent?
A. A group of eggs
B. An embryo
C. A follicle
D. A group of zygotes