本區搜索:
Yahoo!字典
打印

[Bio] HKDSEE 2018 Debriefing

[隱藏]

HKDSEE 2018 Debriefing

Greetings!

The exam has just been over so wanna initiate a debriefing session here.

Paper (I)
Um... The MCQ looked tricky, but the general feeling was fine. In fact, the entire paper was decent to me.
My answers to IA:
1. D C B A D
6. D A C C A
11. D A C A D
16. D C A B D
21. C A B A D
26. A B A B C
31. C C B D D
36. C
Very uncertain about some questions. I didn't do my revision well so forgive me if I made silly mistakes.
You're more than welcome to post yours. To keep it simple, just list out those different from mine.
Regarding IB, I wanna know what did you all write for the last essay question. It seemed like very simple to answer. I was not sure if all the aerobic respiration processes should be comprised for explanation. I didn't write much as in hurry.

Paper II
I chose Questions 1 & 3. What were your answers for the other environmental factors in Q1?

Overall, this set is like the 2013's. To me, 2012 & 2014 still remain the most difficult in the HKDSEE history.

[ 本帖最後由 biomedical 於 2018-4-6 02:11 PM 編輯 ]
   

TOP

Q35 i think a because it is left

TOP

Q 9 should be D as DNA in each individual also distinct
Q16 should be C as fruit contain seed with diff genotype with potato tuber which is identical to parent
Q18 is C as starch in mouth is converted to maltose not glucose
Q24 i guess is B as no O2 absorbed and hence no active transport to absorb minerals A is wrong as leaves cannot produce O2 for other part to use
Q29 is D as biomass means dry mass and plants absorb CO2 for photo to make food
Q30 is B obviously
Q31 is B obviously
Q34 is A as muscle of the aorta cannot contract or relax only the muscular wall at the arteriole opening can contract to regulate the blood flow
Q35 should be right ventricle you can just search online for the labelled diagram

[ 本帖最後由 jkkl 於 2018-4-6 07:41 PM 編輯 ]

TOP

引用:
原帖由 jkkl 於 2018-4-6 05:40 PM 發表
Q 9 should be D as DNA in each individual also distinct
Q16 should be C as fruit contain seed with diff genotype with potato tuber which is identical to parent
Q18 is C as starch in mouth is convert ...
Hey here! Thanks for your reply!

Um...
Q9. That's a struggle to me. I agree Option D is true, but these differences are phenotypes which can be traced down to DNA. I remember species are classified at molecular levels in taxonomy, even though each individual has variations. Just general speaking.
Q16. My bad. I interpreted as "which parts have different genotypes from the others".
Q18. Again, a struggle. I thought salivary secretion began before chewing, but I agree with you. C is the direct incorrect option.
Q24. After reconsideration, yours is true.
Q25. But bulkiness cannot be told from the graph either. Instead, retention time directly affects passive transport.
Q29. Yes, photosynthesis accounts for food production. I just thought plant growth relies on metabolism which consumes oxygen.
Q30. Yes, yours is correct. I just over interpreted. I thought other parts could carry relevant materials to the target leaf for metabolism, thus releasing vapor.
Q31. We're the same.
Q34. My bad again.
Q35. Yes, but shouldn't it be D as mentioned above then?

I appreciate your careful eyes! You will probably attain a perfect score.

[ 本帖最後由 biomedical 於 2018-4-6 07:31 PM 編輯 ]

TOP

回覆 4# biomedical 的帖子

Q9 is mentioned on textbook I guess it is more reliable for eaa to support its ans but in fact it is also uncertain
Q35 Ys D I just reply for the previous challenge haha
Thx for your appreciation but LQ and PP2 matter most :'(

[ 本帖最後由 jkkl 於 2018-4-6 07:42 PM 編輯 ]

TOP

引用:
原帖由 biomedical 於 2018-4-6 07:16 PM 發表

Hey here! Thanks for your reply!

Um...
Q9. That's a struggle to me. I agree Option D is true, but these differences are phenotypes which can be traced down to DNA. I remember species are classif ...
Q35 should be D.
As you can see the muscle wall on L.H.S is thicker than R.H.S..
Therefore, the R.H.S. (X) should be the right ventricle (compare to the location of the valve) and pumping blood to the pulmonary artery.

TOP

引用:
原帖由 jack0716 於 2018-4-6 07:28 PM 發表

Q35 should be D.
As you can see the muscle wall on L.H.S is thicker than R.H.S..
Therefore, the R.H.S. (X) should be the right ventricle (compare to the location of the valve) and pumping blood to ...
Yes, D as I mentioned originally. Identification of the bicuspid is the most direct way.

TOP

回覆 5# jkkl 的帖子

Q25 should be D ys I guess wrongly it is deducing option D is more related to time

TOP

引用:
原帖由 jkkl 於 2018-4-6 07:24 PM 發表
Q9 is mentioned on textbook I guess it is more reliable for eaa to support its ans but in fact it is also uncertain
For Q 25 Question has brief introduction showing the retention time is for undigest ...
'
I think that Q31 should be B.
As we know that chemical X is used for water vapour absorption.
The water loss is mainly due to transpiration ~90%.
For normal plant, there are more stomata at the lower leaf so transpiration rate is faster that upper leaf.
As a result, the mass of X in the lower part would be increase faster than that on the top.

It seems not related to photosynthesis/respiration rate because it not related to transpiration.

TOP

Ys ar Q31 should be B my typo sor

TOP

Why I chose C for Q.31 was that photosynthetic products could be used for respiration which produced vapors. If the P rate goes beyond the R rate, the plant is actively producing vapor.
I was thinking of B for a while, but I thought we couldn't conclude if the increases were insignificant unless with consistency. Besides, isn't that a terrestrial plant has no stomata across the upper epidermis at all?
I'm thinking the reason of setting the air-tied condition in this question... Maybe it's a hint.
You know what, you all are great brains, but I just hate the way HKEAA sets those questions with blurred meanings. Scientifically, all the options in many questions are correct. There's no "best" options but "superficial" ones.

TOP

引用:
原帖由 jkkl 於 2018-4-6 07:24 PM 發表
Q9 is mentioned on textbook I guess it is more reliable for eaa to support its ans but in fact it is also uncertain
Q35 Ys D I just reply for the previous challenge haha
Thx for your appreciation bu ...
I can see at least a star for you! You're extraordinarily careful. Good luck to you, dude!

TOP

回覆 12# biomedical 的帖子

THx

TOP

#

引用:
原帖由 biomedical 於 2018-4-6 08:32 PM 發表
Why I chose C for Q.31 was that photosynthetic products could be used for respiration which produced vapors. If the P rate goes beyond the R rate, the plant is actively producing vapor.
I was thinkin ...
No, I think that respiration would not produce water vapour but water is produced. The water formed inside the cells, evaporate into the airspace and diffuse out from the leave. It relates to the transpiration.

In addition, no stomata not equal to no transpiration, it can reduce the water loss but NOT prevent the water loss . Some plants may have stomata on the top, Just like tomato has ~1200/cm^2 stomata on the upper epidermis.

[ 本帖最後由 jack0716 於 2018-4-6 10:15 PM 編輯 ]

TOP

does anyone have 2018 bio dse paper???

TOP

重要聲明:小卒資訊論壇 是一個公開的學術交流及分享平台。 論壇內所有檔案及內容 都只可作學術交流之用,絕不能用商業用途。 所有會員均須對自己所發表的言論而引起的法律責任負責(包括上傳檔案或連結), 本壇並不擔保該等資料之準確性及可靠性,且概不會就因有關資料之任何不確或遺漏而引致之任何損失或 損害承擔任何責任(不論是否與侵權行為、訂立契約或其他方面有關 ) 。