就考啦!點樣操練dse bio pp先最有果效?(三)

dse 2024 P1b Q7, 呢條係問你點樣?用一條Transect line同一個quadrat去做Systematic sampling. 呢一條已經喺Dse 2013/Q8出過啦, 同學需要寫清楚條transect line係由邊度拉到去邊,如果係海邊就即係由back of shore to Waterfront,同埋要識講個quadrat點擺, 比較容易漏寫regular intervals咁擺放。仲有count the number inside the quadrat, 係要好清楚咁講,要count both the Number of species and abundance of each species. 同學有時候會寫漏後邊嗰個。

 

Q8 vaccination又係一條,無論係DSE HKCEE定係 HKAL Biology都經常會出嘅4分經典題型:

 

Vaccine contains antigens of (which pathogen)

 

To produce memory cells for the antigens of (that pathogen)i.e. primary response

 

When the memory cells encounter the same antigen again

 

Differentiate into B/T lymphocytes to produce large amount of antibodies or killer T cells in a shorter period of time i.e. secondary response

 

呢一條喺Dse 2013 Q9, 2017 Q9 ,同2021 Q6已經出過啦!HKCEE同HKAL都是多次出現的標準4分題。

 

雖然成日都出現,但依然有好多同學答到甩甩漏漏㗎。例如唔知道Antigen係一個keyword, 呢一條係考specific body defence既concept, 免疫系統之所以可以分辨唔同嘅pathogen, 就係因為每個Prefect上面都有佢unique既antigen用嚟做識別, 所以標準marking scheme既第一句就強調vaccine裏面有antigen, 第三句又會強調Memory Cell係要認得the same antigen. 同埋好多同學唔知道第二句只需要講到Memory Cell嘅產生就得㗎啦,唔需要講B或者T lymphocytes住,呢個係留返喺最後一句講嘅。

 

雖然唔係每一份Marking scheme都有mention Primary同Secondary response,但如果寫埋成個concept就會學得更圓滿。而second day response比起Primary response嘅反應係更大同埋更短時間完成。好多同學就淨係寫咗更大量,或者淨係寫更短時間完成,其實呢1分係兩個都要寫齊㗎。

 

最後睇吓我用()括住which pathogen 同that pathogen, 都係有啲同學會寫漏嘅地方,記得按住條題目寫返pathogen個名落去。

 

呢啲我哋就係叫標準題型,會成日翻炒嘅。相信我解到呢一度,大家都會明白,點解仍然咁多同學攞唔足分啦?因為背得唔足,就呢度漏啲嗰度漏啲囉。其次就係冇深入明白個答案講緊啲咩就去背,咁樣除咗會好難背到之外,當題型稍為改變,就冇辦法變通咁fit返落個答案。

 

我是Miss Wong, 專科生物補習老師。歡迎查詢及試堂,包括Dse biology, igcse biology, IB biology, GCE biology, 有小班及少量單對單,親自任教,名額有限。學生成績超班、大有進步才是重點全部有真見證,是bio補習不二之選。

Miss Wong

Miss Wong

一個喜歡寫作,分享生命,建立生命的私人補習老師,擁雙碩士學位的科大生物學一級榮譽畢業生,專科生物補習,國際課程IB補習