Which instrument can i use to see detailed surface of a cell and other structures:
a. light microscope
b. transmission electron microscope
c. x-ray crystallography
d. scanning electron microscope

Letter D, Scanning Electron Microscopy (SEM)

Explanation:

Electron microscopy is one of the most important tools for the analysis and examination of microscopic structures and chemical compositions used in cellular biology. Exist to types of electron microscopy: Transmission Electron Microscope (TEM) and the Scanning Electron Microscopy (SEM). Booth uses electrons to provide high-resolution images of microscopic structures, the difference is that SEM creates an image by detecting the reflections of the electrons provide information about the composition and sample’s surface. While in TEM the electrons pass through the sample, obtaining information about the inner structure.  

In light, microscopy uses light to magnifying naked eye objects, like bacteria. This type of microscopy only provides general observation of the shape of the cells or morphology, but no other details.  

In X-ray crystallography is a specific tool used to analyzed crystals, obtaining the atomic structure of them. It is also used to determinate the size of atoms, chemical bonds, or molecular interactions between compounds.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.

it takes hundreds of years to become stable.

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