IB MYP Biology Reproduction Exam Style Practice Questions
IB myp Biology – Practice Questions- All Topics
Sub Topic :Reproduction
Topic : Evolution– Weightage : 21 %
All Questions for Topic : Life Cycles,Natural Selection,Cell division,Mitosis,Meiosis,Reproduction,Biodiversity,Inheritance and variation,DNA and genetics
Question-IB MYP Biology Reproduction (4 marks)
Fertilization is the combination of genetic material from a sperm and an egg. Explain how fertilization leads to genetic variation in a population.
▶️Answer/Explanation
Ans:
every individual has different genetic material
every sex cell / gamete is unique
genetic material from two parents is combined
A further point, for example [max 1]
• every sex cell / gamete has an equal chance of being fertilized
• the offspring express traits from both parents or an individual is unique from both parents
Question (2 marks)
Flying foxes play an important role in pollination and seed dispersal. State why these processes are important for plants.
Pollination
Seed dispersal
▶️Answer/Explanation
Ans:
Pollination
(pollen needs to be transferred from one plant to another) for reproduction
or
(pollen needs to be transferred from one plant to another) to increase variation
Seed dispersal
(seeds are transported away from parent plant for) better chance to survive or increased
chance to grow or decreased competition
Question:
GnRH causes secretion of LH and FSH. What evidence for this is there in the graph?
▶️Answer/Explanation
Ans: GnRH increases in concentration before LH and FSH rise.
Question:
One of the effects of LH is to cause the testes to secrete more testosterone. Testosterone causes production of sperm and also secondary sexual characteristics such as pubic hair. At approximately what age do you expect the hypothalamus to start secreting GnRH?
▶️Answer/Explanation
Ans: At the age when boys begin puberty/10/11/12/13/14/15.