Section 1, Part A - Multiple Choice (3 Viewers)

[Dubz]

Only got 10 in the MC. Oh dear.

 

[desmol]

YEAHHH!! What was the answer to the hybrid question?? I wrote the apples..

Me too hehe
but I totally blanked out at 'hybridisation' and started thinking about DNA-DNA hydridisation as proof of evolution and common ancestry of chimpanzees and humans.....
took me ages to get back on track

 

[RishBonjour]

The biscuit one is easy.. the question is asking whats the difference between natural selection and the experiment about biscuits. the answer is that the biscuits can't reproduce..

exactly what I put

 

[kylie1D]

I got A for that question because of the lymph system... thats second line.. doesnt prevent entry

 

[RishBonjour]

sorry if its already been asked. but

question 3 was C right? edit: I mean A (cilia, sweat, saliva)


and 16, A ?

OHHH FCKKKKKKKKKKKK. GOT 16 wrong.

 

[mkirsner]

I put D as well.
Reasoning because the question asked for which 'prevented' the risk of entry. Can't be B or C as they are responses to the entry of pathogens and A is just there to fill the 4 responses. There reasoning though could be that A is correct because they're preventative measures. But it's not directly referred to in the syllabus, so I was unsure.

What did people answer for question 3: which of the following are all forms of defence that prevent entry of pathogens?
A- cilia, sweat, saliva
B- T cells .. Obviously wrong
C- inflammation, skin and phagocytosis
D- stomach acid, mucus, lymph system

I answered D

 

[Jamezu]

ok well the stomach and lymph system are all well inside the body, so the pathogens have obviously entered the body. D is wrong, C and B are obviously wrong. A is correct.

 

[S1MZ8]

I thought they could pass on traits coz the buscuits were replaced with the same ones

 

[S1MZ8]

its A, how does lymph system prevent? Thats more involved in the 2nd and 3rd line of defence when the pathogens have already entered.

 

[miranda94]

For the biscuits one i did the passing down of characteristics too, because natural selection only occurs as an evolutionary theory if the characteristic is inherited by future generations. The biscuits didnt really demonstrate this, and the other answers seemed wrong anyway

Overall thought it was a challenging test but not too bad, and I think I went pretty well. Although I was surprised that they didn't ask basically any questions about the kidney, action potential or the brain in communication, and nothing about homeostasis or enantiostasis. Oh well

 

[yumcreampuffs]

I got 13/20 Is this bad ?

omg i got 13/20 too ... quite disappointed with it, but what can you do ..

 

[tahliadeep]

What did people answer for question 3: which of the following are all forms of defence that prevent entry of pathogens?
A- cilia, sweat, saliva
B- T cells .. Obviously wrong
C- inflammation, skin and phagocytosis
D- stomach acid, mucus, lymph system

I answered D

It was A. The lymph system doesnt prevent entry, nor does stomach acid they act on pathogens once they have entered.

 

[tahliadeep]

Re: General Thoughts: Biology

another good example is rennin which is found in milk.

I did the rennin one we used junket

 

[S1MZ8]

OMG.. that curve of best fit. im stupid, i connected the dots ..... anyone else do the same?

 

[hsc2012la]

I put D as well.
Reasoning because the question asked for which 'prevented' the risk of entry. Can't be B or C as they are responses to the entry of pathogens and A is just there to fill the 4 responses. There reasoning though could be that A is correct because they're preventative measures. But it's not directly referred to in the syllabus, so I was unsure.

I picked C but now looking at all your reasoning for D it seems more plausible. Damn. There goes another mark.

 

[hsc2012la]

OMG.. that curve of best fit. im stupid, i connected the dots ..... anyone else do the same?

LOL I saw a guy in my cohort do the same thing and in pen too.

 

[S1MZ8]

I picked C but now looking at all your reasoning for D it seems more plausible. Damn. There goes another mark.

It was A, just to clarify things..

 

[S1MZ8]

LOL I saw a guy in my cohort do the same thing and in pen too.

lol, what was he/she thinking :S. But i should only lose 1 mark? 2 ?

 

[criticalthinker]

What did people answer for question 3: which of the following are all forms of defence that prevent entry of pathogens?
A- cilia, sweat, saliva
B- T cells .. Obviously wrong
C- inflammation, skin and phagocytosis
D- stomach acid, mucus, lymph system

I answered D

u poor thing, lymph system is part of killing the pathogen, not preventing the entry. therefore the answer is A. don't worry i got 11 wrong because didn't read option c correctly!!!

 

[amanda630]

In regards to the last question of the multiple choice (the biscuit one), did anyone put d?
I thought that the whole model was backwards as it demonstrated that the unfavourable species (the lemon biscuits) eventually took over the population, as opposed to the favourable ones as occurs in natural selection. Or are you supposed to view the lemon biscuits as having an survival advantage because no one likes it?

Maybe I'm just over-thinking it?