Biology

Mary Duke

25 July, 17:35

An experiment was designed to investigate the effect of caffeine on the rate of the

heartbeat of fruit flies. Two populations of fruit flies were grown in a lab. Both

populations were raised drinking the same type of water and the same type of food.

Both populations were exposed to the same amount of light and regulated

temperature at 20 degrees Celsius. The fruit flies' heartbeats were then monitored

at two hour intervals. The fruit flies of population one were given caffeine five

minutes before their heartbeat was checked. The fruit flies of population two

were not given any caffeine.

what is the control variable

what is the expirimental group

what is the independent variable

Name a controlled variable or constant

was quantitive or qualitative data collected