DSE 生物BIOLOGY 區

Nicotine as a stimulant 會increase heart rate, increase heart blood pressure and enhances blood clot formation
上面兩個我估就估知就得，但點解會enhance blood clot formation, blood clot 唔係主要關cholesterol 事, 點解關nicotine事？
重有點解alcohol abuse 會cause cancer
諗唔明好難背

因為人奶冇消化酶

Nicotine果個位我自己覺得好難用中學知識解比你聽，睇下有冇其他人答。我建議背一背就算。
Alcohol果個位又係勁撚複雜...你當係啲有毒物質引致cancer，咁樣記啦。不過你要知道唔係所有cancers都同alcohol有關，同埋cancer好多時係由好多contributing factors導致，唔係剩係一個factor。

想問ammonium compound 可唔可以比plant直接吸收？定要變做nitrate 先得? 見有d書又寫leguminous plant use ammonium compound produced by nitrogen fixing bacteria to produce protein. Nitrogen fixing bacteria 只可以轉nitrogen in air to ammonium compound in soil, 之後再轉做nitrate要nitrifying bacteria?
benign tumour 同malignant tumour out唔out c? 係咪所有alimentary canal 既cancer alcohol都可以係cause?

Stem 個d氣孔係lenticel 如果講stomata in stem 係咪錯？ Lenticel 都有水氣走，係咪都叫Transpiration?

Lenticel 還 lenticel
Stomata 還 stomata
總之水分由植物組織蒸發都叫transpiration

因為phytoplankton 個turnover (biomass to production) 夠快，或者簡單啲嚟講就係keep住會有phytoplankton供應比zooplankton，供應嘅量唔多，但都夠biomass 去support zooplankton

Plant可以直接吸收ammonium in form of ions.

benign tumour 同malignant tumour 最大分別係malignant tumour會invade other tissues/organs 而benign就唔會 out唔out c唔清楚

我估Alcohol應該多數會同liver cancer有關係 我只會話alcohol係contributing factor 但係唔會話係cause 因爲飲酒唔一定會導致cancer 但唔飲酒都唔係代表唔會有cancer
Cancer係由好多contributing factors累積最後慢慢先會形成 簡單黎講即係Multifactorial e.g. genetics, environment (radiation,diet,smoking...)

想問吓 嗰d 分辨valves 係open 定close嘅圖 個y-axis 係pressure 同個y-axis係blood pressure 有冇分別㗎

想問auxin 究竟係影響cell division 定cell elongation?

flower plant 個ovary 入面既ovules 係咪每粒裝既egg 都genetically different 好似人既ovary 咁

想問依題點解答案係D, 我知會produce CO2 同唔係塞住Tube 上面但都係唔明點解liquid Level 會rise

Nicotine constricts blood vessels?

Promote 咗 division 先有得 elongate

無記錯既
For mitotic cell division, Parent cell同 daughter cell一向只係強調GENETICALLY identical
無講過係咪PHYSICALLY IDENTICAL

Cell shape cell size會vary
Daughter cell自己會再undergo cell enlargement

因此你條問題應該唔係一定

想問個respiratory tract邊個部分can change its size，見到條Mc bronchus cannot change its size係錯,咁其他部分呢

Trachea 有軟骨圍住
Bronchi 都有軟骨 不過密度無咁高
兩個structure 都可以有限度收縮

搵到部位有smooth muscle就可以伸縮
Google下r tract咩部位有smooth muscle 就得

個答案係B ,但點解cerebellum 唔算？佢個function係coordinate muscular movements, 唔會影響diaphragm muscle?