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smallest units of living things that are themselves alive- can be unicellular or multicellular
Multicellular organisms grow and develop how?
grow in size and shape, initial cell replicates and eventually differentiates
signal that brings response, internal and external (shivering when cold, sweating when hot)
What does a Microscope do?
It produces magnified images of structures that are to small for the human eye to see.
What are the 2 types of Electron Microscopes?
Transmission Electron Microscope, Scanning Electron Microscope
Scanning Electron Microscope
Beams electrons back and forth across the surface, and creates a 3D image
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