Discussion of everything related to the Theory of Evolution.
5 posts • Page 1 of 1
I have my exam in 5 days time and I'm going through old exam papers (which do not have answers):
I am going with (e) "all of the above" BUT (a) seems wrong.
Does mutation keep populations from diverging?
Surely mutation is the source of the variation and therefore promotes divergence.
Um, I'd agree with you, but then I wonder whether d is also incorrect, in that maybe the net effect of mutations is that as many are deleterious as advantageous overall .
c is obviously true, but,I wonder if b is a 'trick' one???
Does it say if you can have more than one correct answer? (ie, tick any and all that are true?)
Have to say, this is exactly why I loathe multiple choice exams - they appear easy and in fact they are fiendish, and I find so often it's a question of having to think the way the examiner thinks....
I mean, wouldn't it be MUCH easier to answer the question 'what role does genetic mutuation play in evolution by natural selection - explain your answer' (etc)!!!
Anwyay, let's see what the experts here tell us! (since I am definitely not one of them!!!!! )
I'm beginning to think (c) is correct as well.
a) sounds false
b) 'with respect to adaptation', adaptation is adaptive, not random
d) most mutation is neutral I think...
e) can't be all of the above
is a random process with respect to adaptation
This is a bit vague - what's 'with respect to' supposed to imply?
After all, mutation is random per se, irrespective of its impact on adaptation (or, rather, adaptability?)
I think C is the only safe one! ??
a) tends to keep populations from diverging
FALSE - It is the very process by which populations diverge.
b) is a random process with respect to adaptation
FALSE (?) - A really "bad" mutation might result in a case where ANY further mutation at that site would be an improvement. (Thats kind of pushing it)
c) increases the supply of genetic variation
FALSE - Not always - a mutation could simply reverse a previous mutation, providing no increase in variation.
d) produces new genetic variants which tend to be slightly deleterious
FALSE - see answer to c)
e) all of the above
So I would go with b)
5 posts • Page 1 of 1
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