How was May/June 2017 Biology P52?

[Panicgirl1516]

wrote difficulty in counting the number of heart beats

Yeahh I put that too for source of error, how did you say you were going to improve it?

 

[darks]

For paper 52- What did everybody write for question 2, the one on the plants?

There was stating the null hypothesis for the Spearmans rank
Working out the Spearmans rank

Which critical value did you guys use?
And what was your explanation for why there was more in higher mean January temperature?

Critical value i think number 9.
our value was higher so relationship was not proven.
more "plant" in higher mean january temperature as the plant is better adapted to that temperature and the temperature is closer to the optimum temperature for the enzymes in the plant so the plant survives better in higher mean january temp. i wrote something like that.

 

[Syed Umar]

For paper 52- What did everybody write for question 2, the one on the plants?

There was stating the null hypothesis for the Spearmans rank
Working out the Spearmans rank

Which critical value did you guys use?
And what was your explanation for why there was more in higher mean January temperature?

The same number as the locations.

 

[darks]

another thing, i wrote is that leave the daphnia in the caffeine solution for 10 minutes, before observing under microscope. The reason for that which of course i didn't write was that caffeine takes time to affect our system. For e.g in humans it takes like 30 minutes to properly come in effect and increase our heart rate.
so if you immediately observe it under microscope the heart rate change would be near to none. The thing that the student immediately do in the experiment was that he added the caffeine sol. immediately after adding the daphnia. There was no mention of time of when do we observe it under the microscope.

 

[Syed Umar]

another thing, i wrote is that leave the daphnia in the caffeine solution for 10 minutes, before observing under microscope. The reason for that which of course i didn't write was that caffeine takes time to affect our system. For e.g in humans it takes like 30 minutes to properly come in effect and increase our heart rate.
so if you immediately observe it under microscope the heart rate change would be near to none. The thing that the student immediately do in the experiment was that he added the caffeine sol. immediately after adding the daphnia. There was no mention of time of when do we observe it under the microscope.

That's a great point, actually.