A2.2 Evidence of endosymbiosis HL - written task
This structured extension question is in the style of the IB exam question using the "explain" command term. The activity is a chance to practice forming these more detailed answers and students can check their answers against the model answer provided. .
- It requires analytical skills more than factual recall.
- This could be a classroom task, a revision moment or a homework activity.
There is a hidden model answer which appears when the answer is submitted.
This extended answer question is in the style of the IB exam questions using the "explain" command term. It is a chance to practice forming these more detailed answers..
The diagram illustrates a proposed timeline of events in the evolution of eukaryotic cells.
There are several pieces of evidence found in present day eukaryotic plant cells that support these ideas.
The focus of the question is on the evidence available from present-day eukaryotic cell structure that eukaryotic cells arose from an endosymbiotic relationship.
Explain the evidence found in present-day eukaryotic plant cells which supports the theory that present-day eukaryotic plant cells evolved from an endosymbiotic relationships between early cells.
(6 marks)
Teachers note - The answer expected is not just a list of the similarities in structure to prokaryotes of mitochondria and chloroplasts, a detailed account including reasons or causes is needed in order to explain the answer.
Check your answers against the model answers.