IB myp 4-5 Biology – Practice Questions- All Topics
Topic :Interaction between organism-Pathogens/Parasites,Predator/Prey
Topic :Interaction between organism– Weightage : 21 %
All Questions for Topic : Pathogens/Parasites,Preadator/Prey,Food chains and webs,Competition,Speciation and Extinction
Question
Question(8 marks)
Human activities can have environmental consequences.
The food web below shows interactions between organisms in a forest. (8 marks)
a.Use the food web above to identify:
A producer (3 marks)
An omnivore
A primary consumer
▶️Answer/Explanation
Ans:
A producer: Grass
An omnivore: Black Beer
A primary consumer: Deer
Question
c .The use of technology will have an impact on the food webs in an ecosystem. The food web below shows the transfer of energy in an aquatic ecosystem.(5 marks)
Using screntific language, describe the impact on two organisms in the ecosystem if the number of tuna is reduced.
Scientists are currently working to develop genetically modified fish in order to meet the world demand for fish. A genetically modified salmon that can grow faster than a traditional salmon has been developed and is currently being raised in fish farms. The faster a fish grows, the sooner it can be sold as food. Scientists hope to develop other genetically modified fish to supplement decreasing wild fish populations around the world.
▶️Answer/Explanation
Ans:
c.
- Identifies the change in an organism if the number of tuna changes, for example
- shark population reduced
- mahi mahi population increases
- mahi mahi population decreases
Correctly linked justification for change, for example (2 max):
- because less food for sharks
- because there are fewer tuna to eat the mahi mahi
- sharks have to eat mahi mahi rather than tuna
A correct use of ecologic terminology, for example (1 max):
- predator
- prey
- trophic level
- consumer
- producer
- herbivore
- carnivore
- omnivore
- species
- population
Question:
Study the photographs in the table and deduce the trophic level of each organism.
▶️Answer/Explanation
Ans: Tiger is a second consumer; monarch butterfly caterpillar is a primary consumer; mosquito is a second consumer; whale shark is a second consumer (assuming the zooplankton it feeds on are primary consumers); panda is a primary consumer; potato aphid is a primary consumer; dog tapeworm is a tertiary consumer; chimp is a primary consumer when it eats plants but is a secondary consumer when it eats monkeys/other primary consumers.