Nature How It Works

Download Mississippi Science, Grade 1 - Interactive Student Edition by HSP PDF

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The cell functions according to its new instructions. Ribosome CYTOPLASM CELL 3 billion Human Cell The approximate number of DNA base pairs that make up the human genome Nucleus: contains genetic material Chromosomes (23 pairs) Cytoplasm: fluid medium with structures called organelles Sec tion of D NA Ribosomes: bodies that assemble proteins TRANSCRIPTION 1 To produce a protein, the two chains of DNA separate at the place that has the instructions to produce it. 2 The DNA code is copied by a similar type of molecule called RNA.

74 CUTTING-EDGE TECHNOLOGY TECHNOLOGY 75 Smart Clothing W ith the invention of smart fabrics and computerized apparel, our clothing will undergo in the coming years one of the most dramatic and surprising evolutions since humans first began wearing clothes. Some of these new breakthroughs already exist: they are showing up for the first time in the market and are becoming readily available for mass consumption. Among them are materials that integrate features that would have been hard to imagine just a few years ago-for example, clothing that not only informs the wearer of the body's response to physical activity but also modifies itself to improve performance.

Sounds an alarm when a house intruder is detected. SECURITY PROTECTION warns of such dangers as fire, water or gas leaks, and electrical faults. COMFORT AND ECONOMY systems to make the home comfortable and to use energy efficiently. Power-failure detector Emergency lighting Mail detector Sensors to detect open doors and windows Turns on emergency lighting Video camera A video system monitors the access points to the house. 72 CUTTING-EDGE TECHNOLOGY TECHNOLOGY 73 Nanotubes Nanotechnology are currently the stars of the field of nanotechnology.

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