PP2-1

[vantreal]

1. (24021-!-item-!-188;#058&000691)

On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.

Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?

(A) In urban areas, geckos are valued because they eat so many insects.
(B) Geckos defend territories against other members of the same species.
(C) House geckos that arrive on islands are carried there in boats and planes.
(D) In places where there are lighted buildings, insects tend to gather around the light.
(E) Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually.

看不太出來light, insects and gecko之間的關係?
麻煩請指教, 3Q~~

[dibert8]

利用閱讀技巧: congregate = gather around => (D)
昆蟲聚集, house gecko 會阻止 mourning gecko 去捕食
都市裡有燈的地方,昆蟲聚集,所以囉! (鄉下就沒那麼多燈讓昆蟲聚集了.)

[evangelinewu]

1. (24021-!-item-!-188;#058&000691)

On Pacific islands, a newly arrived gecko species, the house gecko, is displacing the previously established mourning gecko in urban areas, but populations of the two species are more stable in rural areas far from human settlement. The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.

Which of the following contributes most to an explanation of the difference between gecko populations in urban and rural areas?

(A) In urban areas, geckos are valued because they eat so many insects.無關議題
(B) Geckos defend territories against other members of the same species.限縮主題（討論兩種species）
(C) House geckos that arrive on islands are carried there in boats and planes. 無關議題
(D) In places where there are lighted buildings, insects tend to gather around the light.比較基礎不同（城市/鄉村）
(E) Mourning geckos are all females and reproduce asexually, but house geckos reproduce sexually. 無關議題

請多指教....

[小花]

insects 和 gecko 有什麼關係?

[小花]

喔喔! 想通了
where insects congregate it prevents the mourning gecko from feeding on them.
insects 聚在一起 避免MG吃它
又鄉下和都市的燈不同 造成MG HG數量上的不同

[pimi]

請問大大, 以下我的理解對嗎？？？

在都市,是因為ＨＧ阻止MG吃insects, 所以ＭＧ沒食物吃, 造成MG數量下降
但是鄉村的燈, 不會使insects聚在一起, ＨＧ就不會去阻止MG吃insects, ＭＧ也就不會沒食物吃, 自然鄉村HG跟MG的數量比就比較穩定

[Huang Hsin-Yi]

請問大大, 以下我的理解對嗎？？？

在都市,是因為ＨＧ阻止MG吃insects, 所以ＭＧ沒食物吃, 造成MG數量下降
但是鄉村的燈, 不會使insects聚在一起, ＨＧ就不會去阻止MG吃insects, ＭＧ也就不會沒食物吃, 自然鄉村HG跟MG的數量比就比較穩定

The house gecko does not attack the mourning gecko, but in areas where insects congregate it prevents the mourning gecko from feeding on them.
再看一次,你的姐釋剛好顛倒:
結論HG不會攻擊MG,但是在昆蟲聚集處,HG會防止MG去吃昆蟲
-因此需找出城市與鄉村昆种聚集條件不同之處

(D) In places where there are lighted buildings, insects tend to gather around the light.
-點明城市建築燈亮的地方,昆蟲容易聚集

當然,這可延申很多的解釋:例如: 有燈的地方本來就是HG的地盤,MG怕光...等
但前提都是因為 都市的光