again, incorrect examiner "comment"

[izzahzainab]

http://www.xtremepapers.me/CIE/Cambridg ... 8_qp_1.pdf

check question number 9. the examiner report "marks" D as the correct answer but then comments in favor of C. the examiner says that goblet cells produce enzymes, i searched Wikipedia and other sites which contradict the statement by saying that goblet cells produce mucus. so is there a mistake in the examiner report??
and question number 29 shows a food web. As the tree is just one, why isnt the answer B?

http://www.xtremepapers.me/CIE/Cambridg ... w08_er.pdf

 

[Silent Hunter]

answer for 29 znt B cuz the bar of tree,the second bar,the third one are all same........difference comes in fourth one......as the energy level reduces ata each level so only enough energy is there for a few animals and they obviously cant be larger in no than the third bar

 

[izzahzainab]

well, i think they can be as this is the pyramid of numbers not energy. think of parasites!!! they will make the longest bar although they are at the end!!

 

[abcde]

AoA!
For question 9, as far as I know the correct answer would be D (so the er has to wrong). A goblet cell always produces mucus and the villi secrete digestive enzymes. Isn't that so?

Question 29: A is correct. @izzahzainab: no parasites are involved in this food chain. Since there is just one tree, you could consider both A and B. But then the examiner tests this knowledge: the number of organisms usually decreases down a food chain (since there no parasites here). B is incorrect simply because the number of tertiary consumers cannot be greater than that of the secondary consumers.

 

[izzahzainab]

oh, ok thanku

 

[abcde]

Plus, always remember that the average size of the population of the secondary consumers is usually greater than that of the tertiary consumers.