KEY CONCEPT Technology continually changes the way biologists work.

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Presentation transcript:

KEY CONCEPT Technology continually changes the way biologists work.

Imaging technologies provide new views of life. A microscope provides an enlarged image of an object. light microscopes (LM) Use light to produce an image Magnify up to 1500x Produce 2D image Can view living or preserved specimens stoma

Imaging technologies provide new views of life. A microscope provides an enlarged image of an object. stoma light microscopes (LM) Use light to produce an image Magnify up to 1500x Produce 2D image Can view living or preserved specimens scanning electron microscopes (SEM) Use electrons to produce an image Magnify up to 100,000x Produce 3D image View preserved specimens in a vacuum

Imaging technologies provide new views of life. A microscope provides an enlarged image of an object. light microscopes (LM) Use light to produce an image Magnify up to 1500x Produce 2D image Can view living or preserved specimens stoma scanning electron microscopes (SEM) Use electrons to produce an image Magnify up to 100,000x Produce 3D image View preserved specimens in a vacuum transmission electron microscopes (TEM)

Imaging technology is used in medicine. X-ray images Show dense material

Imaging technology is used in medicine. X-ray images Show dense tissue magnetic resonance imaging (MRI) Show all tissues in the area

Imaging technology is used in medicine. X-ray images Show dense tissue magnetic resonance imaging (MRI) Show all tissues in the area functional MRI (fMRI) Show the areas of the brain that function during an activity

Complex systems are modeled on computers. Computer models are used to study systems that cannot be studied directly. heart attacks Normal heartbeat effect of medicines on the human body movement of water molecules into and out of a cell spread of a disease through a population Heart attack Computer models are used when experiments are not safe, ethical, or practical.

The tools of molecular genetics give rise to new biological studies. A gene is a segment of DNA that stores genetic information. In just over 40 years we have gone from knowing how the genetic code works, to changing genes, to implanting genes from 1 species to another

Through our understanding of DNA, we can study genetics on a molecular level. molecular genetics Study and manipulation of DNA on a molecular level genomics Study and comparison of genomes within and across species

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