Investigation in to the effect of caffeine concentrations on daphnia heart rate concentration of the solution test 1test 2meanresult of t-test measured in beats per minute 06324392358763 05308324316763 03300244272742 02160208184679 01164160162159 00 (water)144104124this is what they're compared to. Hypothesis- their will be a positive correlation between the concentration of caffeine given to the daphnia and its heart rate my reason behind this hypothesis is based on the fact that caffeine affects the heart rate of humans, as it is a stimulant. Start studying biology unit 3 core practicals learn vocabulary, heart rate increases daphnia- null hypothesis. How can the answer be improved. Effect of caffeine on heart rate in daphnia title 'does caffeine affect heart rate' hypothesis i predict that the water fleas heart rate will increase as caffeine is.
Hypothesis : ethanol will decrease the heart rate of the daphnia null hypothesis : ethanol will have no effect on the heart rate of the daphnia i will change the concentration of my ethanol solution by dilution and will therefore plot a graph in addition, a correlation and anova test will be calculated to determine the relationship. Effect of caffeine on heart rate on daphina to observe the effects of different concentrations of caffeine on the heart rate of daphnia null hypothesis:. Hefc biological science - unit 2 joseph colledge assessed practical variation of daphnia heart beat with temperature a) my hypothesis is that with an increase in temperature a daphnia's heart rate will increase, likewise with a reduction in temperature the heart rate will decrease. Daphnia report1 essay hypothesis/ null hypothesis : as the caffeine concentration rises, so does the mean heart rate of daphnia caffeine does not affect the heart rate of daphnia.
Hypothesis/ null hypothesis : as the caffeine concentration rises, so does the mean heart rate of daphnia caffeine does not affect the heart rate of daphnia caffeine: caffeine mimics some of the effects of adrenaline and noradrenaline in the heart. (caffeine increases the heart rate of daphnia ) null hypothesis: in this practical the caffeine should have a noticeable effect on the heart rate of daphnia as. Investigation in to the effect of caffeine concentrations on daphnia heart rate the null hypothesis is the turnover rate for the texas retail industry is 13. This experiment will use daphnia in order to monitor the effects certain drugs have on heart rates i will observe the changes in heart rate of daphnia when exposed to caffeine, ibuprofen, alcohol, and nicotine i will have several separate samples of daphnia in my study each community will be exposed to a different drug and observe how the heart. My null hypothesis is the more ncaa concentration the less heart beats the daphnia will produce per minute variables in this lab the independent variable consist of 10 drops of road salt solutions at a concentration of 5.
A research experiment on the effect of the null hypothesis in all cases is that each of the drugs the heart rate of daphnia under control conditions was. Daphnia heart rate lab- experimental design class set – please return a daphnia is a tiny crustacean title, purpose, hypothesis, null hypothesis, materials,. Hypothesis i hypothesized that as the temperature is increased the daphnia heart rate will increase lower temperature will cause the heart rate to slow down i also hypothesized that the amount of epinephrine will eventually kill the daphnia. The null hypothesis to our experiment was that the average heartbeat rate of the daphnia will not change when it is exposed to a salt concentrate that is, the heartbeat rate of daphnia will remain identical even when the environment changes. My null hypothesis is the more nacl concentration the less heart beats the daphnia will produce per minute variables in this lab the independent variable consist of 10 drops of road salt solutions at a concentration of 5.
The daphnia should be on the slide for the same amount of time: this is because the heart increases the heart rate use similar size daphnia: the smaller the daphnia have a higher rate than bigger daphnia. A null hypothesis stated at the beginning of the experiment was that there is no difference in heartbeat rate when the daphnia species was exposed to a saline environment or temperatures of 10oc and 20oc the results of the experiment showed that the heartbeat rate of daphnia species is affected by both changes in temperature and salinity. Wong found that the heart rate of daphnia decreased since alcohol is a depressant it should have lowered the heart rate of daphnia i feel that the increase in stress on the daphnia may have called this time of increase when daphnia is exposed to nicotine and ibuprofen, the heart rate of the daphnia could not be seen as any different (sollman. The american biology teacher making the most of the daphnia heart rate lab 177 initial experiments focused on the effects of ethanol (1%, 5%, and.
Unit 6 preparation to formulate a good null hypothesis the effect of caffeine on heart rate why daphnia. Hypothesis: daphnia subjected to a caffeine solution will show a rise in heart rate as caffeine is a stimulant that speeds up the body affecting the nervous system and rate in which the nerve pulses are sent and received in humans. Hypothesis/ null hypothesis : as the caffeine concentration rises, so does the mean heart rate of daphnia caffeine does not affect the heart rate of daphnia caffeine: caffeine mimics some of the effects of adrenaline and noradrenaline in the heart it also increases the amount of camp in the senatorial node.
The objective of this research was to determine the effects of acidification, a change in water ph, on the grass shrimp palaemonetes pugio the null hypothesis is that when water temperature, salinity and ph change, the heart rate of the grass shrimp in beats per minute will not change.