Biology Extended Essay Exemplar: What is the effect of Origanum… | RevisionDojo

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IB Biology SL Extended Essay Example

What is the effect of Origanum compactum, Cymbopogon winterianus, Eucalyptus radiata, Mentha spicata essential oils and hand soap on the rate of respiration and the growth of Saccharomyces cerevisiae (Baker's yeast) over a 48 hour period?SL

Official IB Result

IB Grade: A

Criteria A: Focus and Method

5/6

Criteria StrandsPro

A.1Topic communication and explanation

Good

A.2Research question formulation and focus

Moderate

A.3Methodology appropriateness and completeness

Moderate

Criteria Feedback

The student introduces the biological context clearly and shows why the topic is worth investigating.
The student identifies a workable experimental approach with controls, replication, and multiple response measures.
The student generally communicates the investigation’s purpose in a way that is understandable to the reader.

The investigation becomes less focused when it combines two different biological questions in one design.
Some biological claims are overstated or not tightly qualified, especially around respiration and yeast metabolism.
A few variable names and identities are inconsistent, which reduces precision.

Criteria B: Knowledge and Understanding

5/6

Criteria StrandsPro

B.1Application of source material

Good

B.2Use of terminology and concepts

Moderate

Criteria Feedback

The student uses subject-specific terminology accurately in many places, including terms related to controls, statistics, and fungal growth.
The student draws on source material in a generally relevant way to support the investigation.
The student connects the chosen procedure to established scientific practice, which shows good awareness of how methods are justified.

Some source use is broader than the specific investigation and does not always match the exact oils, conditions, or organism used.
The naming of some oils and scientific names is inconsistent.
The student sometimes presents inferred mechanisms as if they were directly shown by the experiment.

Criteria C: Critical Thinking

10/12

Criteria StrandsPro

C.1Research analysis

Moderate

C.2Discussion and evaluation

Poor

C.3Argument development

Moderate

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria D: Presentation

3/4

Criteria StrandsPro

D.1Structure appropriateness

Moderate

D.2Layout and formatting

Moderate

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria E: Engagement (Reflection)

Criteria StrandsPro

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Loading scores...

Official IB Result

IB Grade: A

Criteria A: Focus and Method

5/6

Criteria StrandsPro

A.1Topic communication and explanation

Good

A.2Research question formulation and focus

Moderate

A.3Methodology appropriateness and completeness

Moderate

Criteria Feedback

The student introduces the biological context clearly and shows why the topic is worth investigating.
The student identifies a workable experimental approach with controls, replication, and multiple response measures.
The student generally communicates the investigation’s purpose in a way that is understandable to the reader.

The investigation becomes less focused when it combines two different biological questions in one design.
Some biological claims are overstated or not tightly qualified, especially around respiration and yeast metabolism.
A few variable names and identities are inconsistent, which reduces precision.

Criteria B: Knowledge and Understanding

5/6

Criteria StrandsPro

B.1Application of source material

Good

B.2Use of terminology and concepts

Moderate

Criteria Feedback

The student uses subject-specific terminology accurately in many places, including terms related to controls, statistics, and fungal growth.
The student draws on source material in a generally relevant way to support the investigation.
The student connects the chosen procedure to established scientific practice, which shows good awareness of how methods are justified.

Some source use is broader than the specific investigation and does not always match the exact oils, conditions, or organism used.
The naming of some oils and scientific names is inconsistent.
The student sometimes presents inferred mechanisms as if they were directly shown by the experiment.

Criteria C: Critical Thinking

10/12

Criteria StrandsPro

C.1Research analysis

Moderate

C.2Discussion and evaluation

Poor

C.3Argument development

Moderate

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria D: Presentation

3/4

Criteria StrandsPro

D.1Structure appropriateness

Moderate

D.2Layout and formatting

Moderate

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Criteria E: Engagement (Reflection)

Criteria StrandsPro

Criteria Feedback

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur.
Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.