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Mock Exam IB DP Biology HL Paper 1 Set 4

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.

AnimalDiet
SnakesMice
EaglesSnakes
MiceSeeds

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

Answer/Explanation

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