tailieunhanh - Anh Ngữ Sơ Cấp - Học Tiếng Anh Bằng Hình Ành (Phần 2) part 20

Tham khảo tài liệu 'anh ngữ sơ cấp - học tiếng anh bằng hình ành (phần 2) part 20', tài liệu phổ thông, tiếng anh phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | AH living things are developments from these one-celled organisms. They have developed step by step through change upon change from these first simple living things. Our bodies and the bodies of the plants and animals we see about us are highly complex in their structure. They have in them millions of millions of cells some doing one sort of work some another. Every different cell has its own sort of work to do. What do the words simple and complex mean tltnplei not complex. coiãplexi not tlmple see next pogo . 398 The greater the number of parts a thing has the mon complex it is. The smaller die number of parts a thing has the simpler it is. oe Which of these is the more complex The more different the parts of a thing are from one another the more complex it is. The less different the parts of a thing are from one another the less complex it is. Which of these is more complex 399 The more the parts of a thing need one another the more complex it is. Take one little wheel out of a watch for example and see if the other parts can do their work without it. Which is more complex a stone or a plant The leaves the flower stem and roots of the plant work together to keep it alive. But each does a different sort of work and each is dependent upon all the others. The work of each part is different. The parts erf a stone do not work in this way for one another. A stone is a much simpler thing than a plant. Any living thing however small or simple it may seem is far more complex than anything which has no life. .