Dcpip Study guides, Class notes & Summaries
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AP Bio Practice Exam 1 Correctly Solved
- Exam (elaborations) • 9 pages • 2023
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Humans produce sweat as a cooling mechanism 
to maintain a stable internal temperature. Which 
of the following best explains how the properties 
of water contribute to this physiological process? - ANSWER The high heat of vaporization of water 
allows the body to remove excess heat 
through a phase change of water from 
liquid to gas 
 
A student placed a semipermeable membrane 
inside a U-shaped channel with two chambers, 
as shown. The membrane permits the movement 
of water but not salt. The...
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AP Bio Practice Exam 1 With Complete Questions And Answers
- Exam (elaborations) • 9 pages • 2023
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Humans produce sweat as a cooling mechanism 
to maintain a stable internal temperature. Which 
of the following best explains how the properties 
of water contribute to this physiological process? - ANSWER The high heat of vaporization of water 
allows the body to remove excess heat 
through a phase change of water from 
liquid to gas 
 
A student placed a semipermeable membrane 
inside a U-shaped channel with two chambers, 
as shown. The membrane permits the movement 
of water but not salt. The...
-
Biology Edexcel Pro Final Exam Questions Fully Solved 2024.
- Exam (elaborations) • 3 pages • 2024
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1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 - Answer Daphnia of same species 
Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes 
Then BPM counted using tally marks of a sheet of paper for 15 seconds, x4 to give BPM 
repeated with unknown conc. of caffeine (blind) 
0.0% and distilled water, 0.1% and 0.5% 
Repeat with each daphnia and with other daphnia calculate mean 
 
2. Investigate the vitamin C content of food ...
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Required practical 8 - the effect of dehydrogenase activity on chloroplast write up
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A detailed organised write up for required practical 8 of AQA A level biology - the effect of ammonium hydroxide on the time taken for chloroplasts to decolourise DCPIP. This includes a full methodology, hazards, risks, limitations, conclusion and. references.
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AP Biology Multiple Choice Exam 2023 with 100% correct questions and answers
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A dog is following the scent of a jackrabbit. Which of the following accurately describes how the dog's brain integrates information for smell? 
A) Chemoreceptors in the brain send impulses for smell in the nasal cavity. 
B) Chemoreceptor cells in the nasal cavity sends impulses to the appropriate area of the brain. 
C) Chemoreceptors on epithelial cells of the tongue send hormones to the appropriate area of the brain. 
D) Receptors originating in the nose send action potentials to the motor re...
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IGCSE CIE Biology Paper 6 Revision Questions and Answers
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IGCSE CIE Biology Paper 6 Revision Questions and Answers 
What is an independant variable? - ANSWERS-The variable that is changed by the investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
 
What is a control variable? - ANSWERS-A variable that should be kept constant so as to not affect the result of the dependant variable 
 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an average. Exclude anomalies from your average. 
...
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LATEST 2024 iGCSE CIE Biology Paper 6 Revision
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What is an independant variable? - ANSWERS-The variable that is changed by the 
investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
What is a control variable? - ANSWERS-A variable that should be kept constant so as 
to not affect the result of the dependant variable 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an 
average. Exclude anomalies from your average. 
How many decimal places should you answer with? - ANSWERS-If...
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iGCSE CIE Biology Paper 6 Revision
- Exam (elaborations) • 2 pages • 2024
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iGCSE CIE Biology Paper 6 Revision 
What is an independant variable? - ANSWERS-The variable that is changed by the 
investigator 
What is a dependant variable? - ANSWERS-A variable that changes and is measured 
What is a control variable? - ANSWERS-A variable that should be kept constant so as 
to not affect the result of the dependant variable 
How can you make an experiment better? - ANSWERS-Do it 3 times and then take an 
average. Exclude anomalies from your average. 
How many decimal plac...
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Biology Edexcel Practicals A Level Questions With Complete Solutions
- Exam (elaborations) • 6 pages • 2024
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Biology Edexcel Practicals A Level Questions With Complete Solutions 
 
1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 
Daphnia of same species and volume 
Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes 
Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min 
repeated with unknown conc. of caffeine (blind) 
0.0% and distilled water, 0.1% and 0.5% 
Repeat with each daphnia and with othe...
-
Biology Edexcel Practicals A Level Questions With Complete Solutions
- Exam (elaborations) • 6 pages • 2024
-
- $6.99
- + learn more
Biology Edexcel Practicals A Level Questions With Complete Solutions 
 
1. Investigate the effect of caffeine on heart rate of Daphnia - Topic 1 
Daphnia of same species and volume 
Placed on microscopic tray in pond water in bits of cotton and allowed to acclimatise for 5 minutes 
Then HR counted using tally marks of a sheet of paper for 15 seconds, x4 to give hr/min 
repeated with unknown conc. of caffeine (blind) 
0.0% and distilled water, 0.1% and 0.5% 
Repeat with each daphnia and with othe...
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