What was answer to whether the Denisovans and Neanderthals were one species ?
I said that without DNA analysis, you could not determine whether they were one species due to the fossil record being incomplete (only one finger bone present)
Not sure though.
I'd be shocked if it were homo sapiens, because florensis was was later than all the other small brain hominoids whilst the difference between Neanderthals and sapiens is like.... small
I too said H. florensis because the key wording was "Which one did
not follow the usual trend of hominid evolution?
Florensis came later after afarensis and africans but it had a smaller cranium capacity to both of them, therefore not following the trend.
Oh damn that's actually smart. I just said they should repeat it more lol
I'm not exactly sure whether my answer is viable, but I mentioned that they could extend the range of temperatures tested from 5-> 35 to 5-> 90 degrees as the experiment was only limited to 35*C (note that at higher temperatures the enzyme denatures at the active site thus not able to conduct the reaction)
I wrote something about the constant region of antibodies being similar and the differences in antigen binding site being very minute and small... probably wrong though.
Funnily enough, found it much harder than 2017 and 2018. I made some silly mistakes...
I said something similar too + I mentioned that the structure of the antibody has 2 light chains and 2 heavy chains + 2 antigen binding sites.
****
I didn't know how to justify why scientists used Nuclear DNA instead of mitochondrial DNA. I bsed it and said that "Mitochondrial DNA is passed down maternally and is highly conserved whereas nuclear DNA contains DNA from both parents which allows scientists to notice evolutionary links in similarities of DNA between Denisovans and Neanderthalensis." (Yeah def not right)
Secondly, I was kind of confused about the errors. I think somewhere between student A, B and C I said that they could have incorrectly measured the amount of enzyme put in the solutions causing an increase in rate of reaction therefore decreasing time needed to neutralise the solution./ incorrectly measuring temperature of water bath leading to higher than expected temperature in water bath therefore increasing rate of reaction leading to overall decreased time required to neutralise the solution.