《高一生物必修一知識(shí)點(diǎn)歸納_1.docx》由會(huì)員分享，可在線閱讀，更多相關(guān)《高一生物必修一知識(shí)點(diǎn)歸納_1.docx（14頁珍藏版）》請(qǐng)?jiān)趨R文網(wǎng)上搜索。

1、高一生物必修一知識(shí)點(diǎn)歸納 第一節(jié)從生物圈到細(xì)胞 一、相關(guān)概念、 細(xì)胞：是生物體結(jié)構(gòu)和功能的基本單位。除了病毒以外，所有生物都是由細(xì)胞構(gòu)成的。細(xì)胞是地球上最基本的生命系統(tǒng) 生命系統(tǒng)的結(jié)構(gòu)層次：細(xì)胞組織器官系統(tǒng)(植物沒有系統(tǒng))個(gè)體種群 群落生態(tài)系統(tǒng)生物圈 二、病毒的相關(guān)知識(shí)： 1、病毒(Virus)是一類沒有細(xì)胞結(jié)構(gòu)的生物體。主要特征： 、個(gè)體微小，一般在1030nm之間，大多數(shù)必須用電子顯微鏡才能看見; 、僅具有一種類型的核酸，DNA或RNA，沒有含兩種核酸的病毒; 、專營細(xì)胞內(nèi)寄生生活; 、結(jié)構(gòu)簡(jiǎn)單，一般由核酸(DNA或RNA)和蛋白質(zhì)外殼所構(gòu)成。 2、根據(jù)寄生的宿主不同，病毒可分為動(dòng)物病毒、

2、植物病毒和細(xì)菌病毒(即噬菌體)三 大類。根據(jù)病毒所含核酸種類的不同分為DNA病毒和RNA病毒。 3、常見的病毒有：人類流感病毒(引起流行性感冒)、SARS病毒、人類免疫缺陷病毒 (HIV)引起艾滋病(AIDS)、禽流感病毒、乙肝病毒、人類天花病毒、狂犬 病毒、煙草花葉病毒等。 細(xì)胞的多樣性和統(tǒng)一性 三、細(xì)胞種類： 根據(jù)細(xì)胞內(nèi)有無以核膜為界限的細(xì)胞核，把細(xì)胞分為原核細(xì)胞和真核細(xì)胞 四、原核細(xì)胞和真核細(xì)胞的比較： 1、原核細(xì)胞：細(xì)胞較小，無核膜、無核仁，沒有成形的細(xì)胞核;遺傳物質(zhì)(一個(gè)環(huán)狀 DNA分子)集中的區(qū)域稱為擬核;沒有染色體，DNA 不與蛋白質(zhì)結(jié)合，; 細(xì)胞器只有核糖體;有細(xì)胞壁，成分與真

3、核細(xì)胞不同。 2、真核細(xì)胞：細(xì)胞較大，有核膜、有核仁、有真正的細(xì)胞核;有一定數(shù)目的染色體(DNA 與蛋白質(zhì)結(jié)合而成);一般有多種細(xì)胞器。 3、原核生物：由原核細(xì)胞構(gòu)成的生物。如：藍(lán)藻、細(xì)菌(如硝化細(xì)菌、乳酸菌、大腸桿 菌、肺炎雙球菌)、放線菌、支原體等都屬于原核生物。 4、真核生物：由真核細(xì)胞構(gòu)成的生物。如動(dòng)物(草履蟲、變形蟲)、植物、真菌(酵母菌、 霉菌、粘菌)等。（可刪改）相關(guān)文章一1分鐘英文自我介紹范文 1分鐘英文自我介紹范文1 Hello everyone, my name is x. This is really a great honor to have this opportun

4、ity, and I believe I can make good performance today. Now I willintroduce myself briefly. I am 18 years old，Besides, I have attended severalSpeech competition held in Beijing, which really showed our professionaladvantages. I have taken a tour to some big factories and companies, throughwhich I got

5、a deep understanding of English for application. Compared to developed countries, unfortunately, although we have made extraordinary progress since 1998, our packaging industry is stillunderdeveloped, messy and unstable, and the situation of employees in the fieldis awkward. But I have full confiden

6、ce in its bright future if only our economy can be kept at the growth pace still. I guess you may be interested in why I choosethis job. I would like to tell you that this job is one of my lifelong goals. IfI can work here,I will work hard. As to my character, I cannot describe it well,but I know I

7、am optimistic and confident. Sometimes I prefer to stay alone, reading and listening to the music, but I am not lonely, for I like to chat with my classmates about almost everything. Myfavorite pastime is to play volleyball, to play cards or to surf online. Fromlife at university, I learn how to bal

8、ance study and entertainment. By the way,I was an actor in our amazing drama club. I have a few glorious memories onstage. That is my pride. 大家好,我的名字是x。這真的是一個(gè)很榮幸能有這個(gè)機(jī)會(huì),我相信我可以讓今天良好的性能?，F(xiàn)在我將簡(jiǎn)要介紹一下我自己。我18歲,除此之外,我參加了在北京舉行的許多演講比賽,這顯示我們的專業(yè)優(yōu)勢(shì)。我參觀了一些大的工廠和公司,通過它我有一個(gè)深刻的理解英語的應(yīng)用程序。 與發(fā)達(dá)國家相比,不幸的是,盡管我們?nèi)〉昧朔欠驳倪M(jìn)展自1998

9、年以來,我們的包裝產(chǎn)業(yè)還不發(fā)達(dá),混亂和不穩(wěn)定,員工在現(xiàn)場(chǎng)尷尬的情況。 但我對(duì)它的光明的未來充滿信心,如果只能保存在我們的經(jīng)濟(jì)增長速度。我猜你可能會(huì)感興趣我選擇這份工作的原因。我想告訴你,這份工作是我的終生目標(biāo)。如果我能在這里工作,我將努力工作。至于我的性格,我無法描述得很好,但我知道我是樂觀和自信。 有時(shí)我寧愿一個(gè)人呆,閱讀,聽音樂,但我不寂寞,我喜歡和我的同學(xué)聊天幾乎一切。我最喜歡的消遣是打排球,打牌或網(wǎng)上沖浪。從大學(xué)生活,我學(xué)會(huì)如何平衡學(xué)習(xí)和娛樂。順便說一下,我是一個(gè)演員在我們驚人的戲劇俱樂部。我有一些光榮的記憶在舞臺(tái)上。這是我的驕傲。 1分鐘英文自我介紹范文2 Hello,boys an

10、d girls.Today I am very glad to stand here and introduce myself.My name is FengJiamin,Im Hello,大家好.非常高興今天能站在這里介紹我自己.我叫馮,我12歲了. 12years old. Im in Class1, Grade 5. I like listening to music and playing sports.And I like ice-cream very 我在五年級(jí)一班.我喜歡聽音樂,做運(yùn)動(dòng).我非常喜歡冰淇淋, much.Its sweet and delicious.My favor

11、ite subjects are Chinese,math and English. I thingk I am an easy- 它又甜又美味. 我最喜歡的科目是語文,數(shù)學(xué)和英語. 我想我是一個(gè)隨和的小女孩, going girl,and I hope everyone will like me. Thank you. 我希望大家會(huì)喜歡我,謝謝. 1分鐘英文自我介紹范文3 Hello! My name is Chen Danqing. My English name is Joy. Im 14 years old. Im a happy girl. I have a happy family

12、. My father and my mother are both officeworkers. Theyre busy. But at weekends, they always cook nice food for me. Imhappy in the family. I love my parents and they love me very much. Im a student at Dongzhou Middle School. It is very big and beautiful. There are many classroom buildings and office

13、buildings. Besides the buildings,there is a big playground. After school, there are lots of boys playingbasketball on it. I think they are happy. There are a lot of flowers and treesin my school. They are beautiful. I like my school. In my school, I have manyfriends. All my friends are polite and he

14、lpful. My friends are all nice to me.They can make me happy. So I like playing with them. My hobbies are listening to music and reading. I like pop music very much. I dislike sports because Im not strong. Its hard for me. I have a happy family, a beautiful school and many nice friends. I enjoy every day. 你好!我的名字叫就陳丹青。我的英文名字叫快樂。我14歲。我是一個(gè)快樂的女孩。我有一個(gè)幸福的家庭。我的父親和母親都是上班族。他們很忙。但是在周末,他們經(jīng)常煮好吃的給我。在家庭中我很高興。我愛我的父母,他們非常愛我。 我是一名學(xué)生在東洲中學(xué)。它是非常大的和美麗的。有很多教室建筑和辦公大樓。除了建筑,有一個(gè)大操場(chǎng)。放學(xué)后,有很多男生打籃球。我認(rèn)為他們是快樂的。有