HKW

Thursday, May 20, 2010

An interesting example of artificial selection

Heikea japonica crab is found in Japanese waters. The pattern on the back of the crab resembles the face of a samurai warrior. Owing to Japanese respect for samurai warriors, those crabs with carapace pattern resemblance to a warrior's face were less likely be eaten than others. Generations of superstitious fishemen threw back the crabs that resembles human faces into the sea. As the generations passed, crabs resembling human faces survived better and passed on the genes responsible for this particular feature to their offspring. The product of this cultiral based 'artificial selection' is a species of crab with the carapace pattern perfectly resembling the fiercely grimacing face of a samurai warrior.


Question:

Can the evolution of Heikea japonica happ
en outside Japanese waters? Why?


Sunday, May 09, 2010

通識科考試備忘

以下是由經驗通識科老師所提供的應試貼士:

答題技巧
1. 審題
 仔細閱讀題目,注意提問用詞及留意關鍵詞,答案須回應題目所問
2. 答案長短及格式按分數多寡決定
 6分或以上題目須分段作答 (引言、內文及總結)
 引言清楚申明立場
 內文須分段,每段一個論點,每段以連接詞及主題句(論點)開始,輔以例子、數據及相關概念詳細解釋論點,須善用資料作答及緊扣題目,切忌問非所答
 以多元、不同角度及層面清楚表達論點以支持個人立場
提出至少一個反對立場的論據,然後提出駁論,進一步鞏固立場
 總結段落綜合所有論點,再重申立場

2. 時間管理
 各題作答時間宜平均,但以題目的分數多寡為決定因素
 完成所有題目,不應只偏重某些題目