Question

Sue is setting up an experiment to test whether fly maggots select a dark or a brightly lit environment. She sets up a chamber in which there is a gradient in light intensity from one end (dark) to the other (brightly lit). The experimental hypothesis was “There will be a large difference between the number of maggots in a dark environment and the number in a brightly illuminated one.”

Which of the following is Sue’s control condition? Select one option from the list below.

1) The same chamber and maggots but with a different light intensity gradient.

2 ) The same chamber and maggots but with a coloured light gradient.

3 ) An identical chamber with the gradient in illumination reversed. wrong answer

4) An identical chamber but with maggots of a different species.

5) An identical chamber with no light gradient.

6) A chamber with a different distance between the darkest and most brightly lit parts.

7) An experiment at a different time of day.

for control condition (B)
and For Experimental control (c) someone tell me the correct answer plz.

Answer 1

why do you keep posting the same question? You must really need help...

Answer 2

Well, the question asks to choose the option that is a (Sue's) controlled condition.

A "Controlled Condition" means that variables that can affect the data collected from an experiment are monitored and held constant.

Answer 3

I really wish I knew the answer, but if I were you I guess I'd go with option 1. :)

Answer 4

5

that way you can see if the maggots gather even without the light gradient

although I would do 3