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  3. 學習啦>學習方法>各學科學習方法>閱讀答案>《科學家揭開變色龍變色之謎閱讀題答案》正文

    科學家揭開變色龍變色之謎閱讀題答案

    時間:2016-07-29 14:22:55本文內容及圖片來源于讀者投稿,如有侵權請聯系xuexila888@qq.com 淑航 我要投稿

      通過閱讀《科學家揭開變色龍變色之謎》這篇文章,你會發現變色龍不是通過色素來改變顏色的,而是靠調節皮膚表面的納米晶體。下面是學習啦小編收集整理的《科學家揭開變色龍變色之謎》的閱讀題目及其參考答案以供大家學習。

      《科學家揭開變色龍變色之謎》閱讀原文:

     、匍L期以來,人們一直對變色龍通過變色吸引同伴,嚇退情敵、迷惑捕獵者的原理著迷。

     、诮裉,科研人員宣布他們揭開了變色龍變色的秘密,而這一發現讓他們大為震驚。

     、劭蒲腥藛T發現,變色龍不是通過色素來改變顏色的,而是靠調節皮膚表面的納米晶體,通過改變光的折射而變色的。

     、苋諆韧叽髮W的生物學家米歇爾・米林科維奇說:“我們十分驚訝,人們曾認為它們是通過色素來變色的,但真正的原理完全不同。”

     、菪坌宰兩堊兩,可以讓自己的外表更加華麗,以吸引異性、嚇退情敵;或是讓自己的外表更加不起眼,從而躲過捕食者。

     、薮蠖鄶灯渌N類的變色動物通過黑色素在載黑素細胞內聚集和發散來調整顏色的明暗程度,它們改變的是顏色的亮度而不是色調。

     、哐芯繄F隊稱,此前人們也一直用該原理解釋變色龍的變色過程。但這個說法,現在被證明是錯誤的。

     、釋ψ兩埰つw的分析顯示,變色龍的變色是由透明的被稱為“光子晶體”的納米物質控制的,光子晶體位于虹細胞層,在變色龍的色素細胞之下。

     、崛諆韧叽髮W在一份報告中說,變色龍可通過“調節”虹細胞內的納米晶體結構來改變光線的折射。“當變色龍狀態平靜時,納米晶體呈密集網狀分布,折射出藍光。而當變色龍興奮時,納米晶體結構會變得松散,因此折射的光線呈黃色或紅色等其他顏色。

     、馑麄儼l現變色龍還有更深一層的虹細胞.這些細胞包括“體積更大、更不規律”的晶體,可折射強光,實質上是一層智能隔熱板。

      研究團隊說:“虹細胞呈兩層分布是進化的新特點。這令變色龍可以迅速在有效保護色和鮮艷顏色間轉換,同時提供被動熱防護。”其他爬行動物體內只有一種無法變色的虹細胞。

      (選自 2015年3月12日 《參考消息》)

      《科學家揭開變色龍變色之謎》閱讀題目:

      17.文章第①段是否可以刪去?請說明理由。(3分)

      答:__________

      18.變色龍變色原理的傳統解釋是什么?科研人員指出這種認知的誤區在哪里?(2分)

      答:__________

      19.現在科研團隊探明變色龍變色時,納米晶體結構變化和顏色變化有何關聯?(2分)

      答:__________

      20.文中第⑩段加點處使用了什么說明方法?作用是什么? (2分)

      答: __________

      21.下列表述不符合原文意思的一項是(2分)(   )

      A.雄性變色龍通過變色來吸引異性、嚇退情敵,迷惑捕獵者。

      B.其他種類的變色動物通過黑色素在載黑素細胞內聚集和發散來改變其色調。

      C.變色龍的變色是由位于虹細胞層的“光子晶體”這種納米物質控制的。

      D.變色龍的虹細胞呈兩層分布,這是其進化的新特點。

      《科學家揭開變色龍變色之謎》閱讀答案

      17.不可刪去。(1分)可引發人們的閱讀興趣,(1分)引出下文說明對象。(1分)

      18.傳統解釋是變色龍通過色素來改變顏色。(1分)科研人員發現其改變的是顏色的亮度而不是色調。(1分)

      19.①納米晶體呈密集網狀分布,折射出藍光。(1分)②納米晶體結構變得松散,折射光線呈黃色或紅色等。(1分)

      20.打比方。(1分)作用:通俗形象地說明變色龍虹細胞起到被動熱防護作用。(1分)

      21.B

      《海中變色龍》閱讀原文:

      丁劍玲

     、僬f起變色龍,誰都知道那是描述蜥蜴(爬行動物,體長約30厘米,能改變皮膚顏色)?墒窃S多人并不知道,海里也有變色龍,它就是大名鼎鼎的章魚。

     、谡卖~挺著個圈圈的大肚子,長在頭上的8條腕足在水中隨波搖曳,翩翩起舞,遠遠看去,像一朵花在海里翻動,非常美麗。章魚其實不是魚,它屬于軟體動物。

     、壅卖~和蜥蜴一樣,皮膚下布滿了各種色素細胞,紅橙黃綠,樣樣齊備。它可以利用細胞的伸縮來改變自己身體的顏色,以便和周圍環境的顏色保持一致。

     、苷卖~遇上敵人,會先施展“變色術”,一會兒變成白色,一會兒變成紅色,幾種顏色不停地變換,以此來嚇唬敵人。如果這招不行,它才會動用自己肚子里的墨囊,急劇收縮身體,噴出墨汁狀的“煙霧彈”,把周圍的海水染成一片漆黑,趁進攻的魚兒暈頭轉向、不知所措之機,逃之夭夭。

     、莓斦卖~見到獵物的時候,全身會變成令人恐怖的鮮紅色;它用腕足抓住獵物,送到嘴邊。章魚的唾液腺能分泌出高效麻醉液,很快將獵物麻醉,然后就可以慢慢享用美餐了。有些海洋公園利用章魚給游客表演。只見它忽而萎縮成一團,忽而伸展開來,8條腕足不斷擺動,擺出各種姿勢,同時還不停地變換體色,讓人們欣賞它那絕妙的變色術。

     、拚卖~非常警覺,即便在洞中或礁石下棲息時,也會留兩條腕足在外面輕輕搖動。一旦有什么情況,章魚會立刻警覺起來,或躲避得更深,或用腕足牢牢纏住對方,把它纏死或毒死。

     、叽普卖~可以稱得上是海洋動物中的慈母,一產卵后,便不吃不喝,精心孵化小寶寶。在此期間,它不準其他任何動物靠近,即使章魚爸爸不小心進入,也會被毫不留情地咬死。平時,章魚媽媽會用腕足輕輕翻動孵粒,并從肚子里的“口袋”中噴出水來逐個給孵粒沖洗,使它們獲得充足的氧氣,并保持清潔。當小寶寶出世后,章魚媽媽一般會因饑餓和勞累,辛苦地死在子女身旁。

     、嗾卖~中的“巨人”大王章魚,其腕足可長達18米,是異常兇猛且好戰的動物,在海中稱王稱霸。它不僅四處追逐魚蝦,而且經常自相殘殺,甚至時常偷襲漁船,或將船攔腰斬斷,或用大大的腕足沖上漁船抓住人,吞入口中,然后迅速消失。因而.漁民們稱它為“海底惡魔”。

      《海中變色龍》閱讀題目:

      17、為什么說章魚是“海中變色龍”?它有哪些特征?(4分)

      18、文中第⑧段中運用了哪些說明方法?請你選擇其中的一種并說說它的作用。(4分)

      19、文章第⑦段從那幾個方面來體現雌章魚“慈母”的特點的?請分條概括。(4分)

      20、本文語言準確、生動,試就一方面舉例說明。(3分)

      《海中變色龍》閱讀答案:

      17、第一問①章魚皮膚下布滿了各種色素。②可以根據周圍環境改變自己的顏色。第二問①善于變色(會施展“變色術”)②聰明警覺③有一定的攻擊性。

      18、舉例子、列數字、打比方 如:章魚中的“巨人”大王章魚,其腕足可長達18米,是異常兇猛且好戰的動物,在海中稱王稱霸。這一句用了打比方和列數字的說明方法,形象準確地說明了大王章魚的巨大。/它不僅四處追逐魚蝦,而且經常自相殘殺,甚至時常偷襲漁船,或將船攔腰斬斷,或用大大的腕足沖上漁船抓住人,吞入口中,然后迅速消失。因而.漁民們稱它為“海底惡魔”。這里用了舉例子和打比方的說明方法,形象真實地說明了大王章魚異常兇猛。

      19、①一產卵后,便不吃不喝,精心孵化小寶寶。②孵化期間,它不準其他任何動物靠近。③平時翻動、沖洗孵粒,使它們獲得氧氣,保持清潔。④當寶寶出世后,章魚媽媽會因饑餓和勞累死在子女身旁。

      20、生動性略 準確性:①章魚媽媽一般會因饑餓和勞累,辛苦地死在子女身旁。②而且經常自相殘殺,甚至時常偷襲漁船。③在此期間,它不準其他任何動物靠近。

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