DCPIP Study guides, Class notes & Summaries

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...

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...

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 ...

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.

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...

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. ...

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...

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...

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 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...