Yahoo 知識+ 將於 2021 年 5 月 4 日 (美國東岸時間) 停止服務。從 2021 年 4 月 20 日 (美國東岸時間) 起,Yahoo 知識+ 網站將轉為僅限瀏覽模式。其他 Yahoo 資產或服務,或你的 Yahoo 帳戶將不會有任何變更。你可以在此服務中心網頁進一步了解 Yahoo 知識+ 停止服務的事宜,以及了解如何下載你的資料。

? 發問於 科學及數學生物學 · 1 十年前



1. How are unicellular organisms different from the more complex organisms?

A. Unicellular organisms do not respond to stimuli.

B. Unicellular organisms do not reproduce.

C. Unicellular organisms do not have tissues.

D. Unicellular organisms are made up of a number of cells.

2. In the preparation of a microscopic slide, the specimen has to be stained in order to

A. make the cells slightly larger.

B. make the speciman more attractive.



C. separate the cells from each other.

D. make certain structures visible.

3. Two organisms can be said to be of the same species if

they live together in the same habitat. T/F

they have many common characteristics. T/F

更新 2:

Urgent one! Help me!

更新 3:

Q.1 C. Unicellular organisms do not have tissues.

not means no tissue.

更新 4:

you correct, that's just my problems.

1 個解答

  • 1 十年前

    1. C (單細胞動物何來有組織?它們也會繁殖和對刺激有反應)

    2. D(細胞是無色的)


    1. F(例子:麻雀和駝鳥同種不同住 ,一個在樹上,一個在地上);

    2. T(例子:麻雀和駝鳥同種,大家都有翼。)