✔ 最佳答案
Kingdom Prokaryotes:
Prokaryotes are very tiny and can only be seen with the high power of a light microscope. They consist of a single cell but do not have any true nucleus, mitochondria or chloroplasts. They exist in air, water, soil, or inside other organisms. Some of the prokaryotes cause diseases, eg. chloera, meningitis and tetanus. But some are very importatnt to the environment as they recycle materials in ecosystem. Prokaryotes include bacteria and blue-green algae.
原核生物界:
細菌是現存地球上第二簡單的生物,屬於原核生物界,也就是沒有真細胞核的生物。這類生物沒有膜質的細胞器細菌廣泛分佈於地球不同生境,如泥土、水、及各種生物體內。有些細菌對人類有害,導致疾病、物質腐壞等;有些對人類有益,如分解者有助完成重要元素的循環。有不同的外貌(球菌、桿菌、螺旋狀菌、弧菌)和形態。有些細菌帶有鞭毛,但通常只用於吸附環境。 有些細菌會群生而形成菌。菌落細小,接觸環境的面積比相對很大。
Kingdom Protoctista:
Protoctista are usually tiny and can be seen with the lowpower of light microscope. Most of them consist of a single cell with a true nucleus but some are multicelluar. Some are plant-like and some are animal-like. They live mainly in water or inside other organism. Examples include Amoeba, paramecium, trypanosoma.
原生生物界:
原生生物包括簡單的真核生物(即具有真正的細胞核),多為單細胞生物,亦 有部份是多細胞的,但不具組織分化。這個界別是真核生物中最低等的。
單細胞的原生生物集多細胞生物功能於一個細胞,包括水份調節,營養,生 殖等。
營養的方式繁多,有些則似真菌,吸收外間營養;更有部份既行光合作用, 亦可進食有機食物,例如裸藻。
Kingdom Fungi:
Fungi are made up of a single cell or thread-like structures called hyphae, which may be interwoven to form mushroom-like structures. Like plants, they have cell walls and do not move. But unlike plants, they have no chlorophyll to make their own food and do not have any roots, stems or leaves.They are usually sarophytic or parasitic and live in soil or inside other organisms, especially plants. Examples include bread mould, penicillium, yeast and mushroom.
真菌界:
絕大部份是由絲狀體(菌絲)所構成。這上絲狀體組成菌絲體。菌絲多呈管狀(直徑在0.01毫米以下)。部份真菌的菌絲有橫隔壁把菌絲分為類似細胞的單元,但每個「細胞」卻有一至數個細胞核,且隔壁上有小孔,容許細胞質通過,所以與普通細胞有所分別。一些較低等的真菌則不具橫隔壁。真菌的菌絲具細胞壁,成份多為幾丁質(chitin),而非如植物細胞是由纖維素構成。還有真菌的菌絲不含光合作用色素,所以真菌是不能夠進行光合作用,而是以腐生或寄生方式生活。菌絲或由菌絲形成的 吸器 可以分泌消化液,將與其接觸的食物分解,然後吸收。真菌可進行無性生殖及有性生殖。無性生殖 可透過菌絲體斷裂,細胞分裂(像酵母菌的單細胞真菌)及孢子生殖(像霉菌)來進行。有性生殖則通過性細胞的結合來完成。高等真菌(像蕈菌)的有性生殖是在一個叫 子實體 的結構裏發生。例如,我們平常食用的草菇這種真菌的子實體。其他例子還有冬菇,竹蓀,木耳,靈芝等。這些食用菌都是它們所屬真菌的子實體。經過性細胞融合後,這些子實體裏會產生很多有性孢子,進一步增強這些真菌的繁殖及傳播能力。
Kingdom Plantae:
All plant cells have a cell wall and green plant cells contain chlorophyll. They make their own food by photosynthesis. They do not move rom place to place. Examples include narcissus, fern and lotus.
植物界:
植物界內的都是自養營養的真核生物。細胞內有葉綠體,內含葉綠素和其他色素,以二氧化碳作為碳的來源。植物的細胞壁內有纖維素。能進行有性和無性生殖,並出現單倍體和二倍體階段的交替。單倍體的配子體產生配子,受精後發育成二倍體的孢子體。孢子體在孢子囊內透過減數分裂產生單倍體的孢子,以發育成配子體。
Kingdom Animalia:
Animal cells do not have any cell wall. Animals cannot make their own food and must take in food. Most of them can move from place to place. Examples include lion, tiger and bird.