H02002 - Study guides, Class notes & Summaries
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OCR 2023 Biology A H020/02: Depth in biology AS Level Question Paper & Mark Scheme (Merged)
- Exam (elaborations) • 54 pages • 2024
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QUESTIONS AND ANSWERS
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#O C R AS Level Biology A H020/02 Depth in biology May 2023
- Exam (elaborations) • 29 pages • 2024
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#O C R 
AS Level Biology A 
H020/02 Depth in biology 
May 2023
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H020/02, Depth in biology (AS/A level), June 2023/2024 computing Administrator
- Exam (elaborations) • 46 pages • 2024
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). Aphids are small insects that feed on the sap that is translocated through the plant in the phloem. 
These insects insert their fine mouthparts, stylets, into phloem tissue and allow the sap to flow out of the phloem. 
 
One method of collecting sap is to allow the aphid to feed as shown in Fig. 1. 
 
 
 
Fig. 1.1 
 
The aphid is then anaesthetised and the stylet is cut off close to the aphid’s head. The sap can then be collected and analysed. 
 
A researcher analysed the sap collected and ...
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Biology A H020/02: Depth in biology AS Level
- Exam (elaborations) • 33 pages • 2024
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Biology A 
H020/02: Depth in biology 
AS Level
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2024 AS Level Biology A H020/02 Depth in biology Monday 4 June 2018 2024 FINAL UPDATE PASS A+
- Exam (elaborations) • 8 pages • 2024
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2024 AS Level Biology A 
H020/02 Depth in biology 
Monday 4 June 
FINAL UPDATE PASS A+
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