Ib biology evolution Study guides, Class notes & Summaries
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AQA GCSE COMBINED SCIENCE: TRILOGY 8464/B/2H Biology Paper 2H Version: 1.0 Final *JUN238464B2H01* IB/M/Jun23/E7 8464/B/2H QUESTION PAPER & MARKING SCHEME/ [MERGED] Marl( scheme June 2023
- Exam (elaborations) • 53 pages • 2024
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GCSE 
COMBINED SCIENCE: TRILOGY 
8464/B/2H 
Biology Paper 2H 
Version: 1.0 Final 
*JUN238464B2H01* 
IB/M/Jun23/E7 8464/B/2H 
For Examiner’s Use 
Question Mark 
1 
2 
3 
4 
5 
6 
TOTAL 
Friday 9 June 2023 Afternoon Time allowed: 1 hour 15 minutes 
Materials 
For this paper you must have: 
• a ruler 
• a scientific calculator. 
Instructions 
• Use black ink or black ball-point pen. 
• Pencil should only be used for drawing. 
• Fill in the boxes at the top of this page. 
• Answer all ...
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IB Biology HL Option A.4 Questions and Answers Already Passed
- Exam (elaborations) • 6 pages • 2024
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IB Biology HL Option A.4 Questions and 
 
Answers Already Passed 
 
What is innate behaviour? Provide an example. 
inherited from parents and develops independently of environment as it is unaffected by animal's 
experiences e.g. palmer grasp reflex in babies 
How can innate behaviour change? What is the rate of change? 
- can change through evolution via natural selection 
- rate of change much slower than with learned behaviour 
Describe how invertebrate experiments can be conducted to observ...
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AQA GCSE BIOLOGY Higher Tier Paper 2H 2021.
- Exam (elaborations) • 45 pages • 2022
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Please write clearly in block capitals. 
Centre number Candidate number 
Surname 
Forename(s) 
Candidate signature 
I declare this is my own work. 
GCSE 
BIOLOGY 
Higher Tier Paper 2H 
H 
2 
*02* 
IB/M/Jun21/8461/2H 
Answer all questions in the spaces provided. 
0 1 The nucleus of a cell contains DNA. 
0 1 . 1 Name the structures inside the cell nucleus that contain DNA. 
[1 mark] 
Figure 1 shows part of a DNA molecule. 
Figure 1 
0 1 . 2 Name the part of the DNA molecule labelled X. 
[1 mark] 
...
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UWCSEA IB Biology 2025 - A2.1 Origins of Cells with Complete Solutions
- Exam (elaborations) • 4 pages • 2024
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UWCSEA IB Biology 2025 - A2.1 Origins 
of Cells with Complete Solutions 
 
A2.1.1—What were the conditions on early Earth? What pre-biotic (pre-life) carbon compounds 
were present? 
there was a lack of free oxygen; 
and therefore no ozone to protect from UV radiation; so high levels of UV penetrated and 
reached the Earth's surface; 
there were much higher concentrations of carbon dioxide; 
and methane; 
resulting in higher temperature; 
The conditions may have caused a variety of carbon com...
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IB biology past essay questions HL and SL all units and mark scheme 2023 (A+)
- Exam (elaborations) • 50 pages • 2023
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IB biology past essay questions HL and 
SL all units and mark scheme 
2023 (A+) 
Outline what is meant by the trophic level of an organism with three examples from one 
named habitat. (4 max) - Answer-feeding level for an organism in a food chain 
naming of habitat (1 mark) 
naming three trophic levels correctly (1 mark) 
three examples forming a food chain from the named habitat (1 mark) 
2. Compare the ways in which autotrophic, heterotrophic and saprotrophic organisms 
obtain energy. (6 ma...
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IB Biology HL Option A.4 Questions and Answers Already Passed
- Exam (elaborations) • 6 pages • 2024
-
- $9.99
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IB Biology HL Option A.4 Questions and 
Answers Already Passed 
What is innate behaviour? Provide an example. 
inherited from parents and develops independently of environment as it is unaffected by animal's 
experiences e.g. palmer grasp reflex in babies 
How can innate behaviour change? What is the rate of change? 
- can change through evolution via natural selection 
- rate of change much slower than with learned behaviour 
Describe how invertebrate experiments can be conducted to observe be...
-
IB biology past essay questions HL and SL all units and mark scheme 2023 (A+
- Exam (elaborations) • 50 pages • 2023
-
- $13.99
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IB biology past essay questions HL and 
SL all units and mark scheme 
2023 (A+) 
Outline what is meant by the trophic level of an organism with three examples from one 
named habitat. (4 max) - Answer-feeding level for an organism in a food chain 
naming of habitat (1 mark) 
naming three trophic levels correctly (1 mark) 
three examples forming a food chain from the named habitat (1 mark) 
2. Compare the ways in which autotrophic, heterotrophic and saprotrophic organisms 
obtain energy. (6 ma...
-
IB SL BIOLOGY TOPIC 4 ECOLOGY COMPLETE STUDY GUIDE 2023
- Exam (elaborations) • 8 pages • 2023
- Available in package deal
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IB BIOLOGY TOPIC 4 
ECOLOGY COMPLETE 
 STUDY GUIDE 2023 
Topic 4.1: Ecology – Species, communities and ecosystem 
The continued survival of living organisms including humans depends on sustainable communities. 
• Understanding: Species are groups of organisms that can potentially interbreed to produce fertile offspring. 
 Species: groups of organisms that can potentially interbreed to produce fertile off-springs 
 Crossbreeding: interbreeding between different species with off-springs ...
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IB biology past essay questions HL and SL all units and mark scheme 2023 (A+)
- Exam (elaborations) • 50 pages • 2023
- Available in package deal
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- $16.99
- + learn more
IB biology past essay questions HL and 
SL all units and mark scheme 
2023 (A+) 
Outline what is meant by the trophic level of an organism with three examples from one 
named habitat. (4 max) - Answer-feeding level for an organism in a food chain 
naming of habitat (1 mark) 
naming three trophic levels correctly (1 mark) 
three examples forming a food chain from the named habitat (1 mark) 
2. Compare the ways in which autotrophic, heterotrophic and saprotrophic organisms 
obtain energy. (6 ma...
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IB Biology SL notes
- Summary • 49 pages • 2023
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These notes contain everything from the IB Biology SL syllabus, including cellular biology, molecular biology, ecology, genetics, evolution and human physiology. Includes diagrams and charts as well. Super detailed, ensured I got a 7/7 on Biology.
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