Which type(s) of microscopes can produce three-dimensional images of cells? a. transmission electron microscopes c. both a and b b. scanning electron microscopes d. neither a nor b

The answer is part A. Scanning electron microscopes. They use an  electron beam. A SEM can give better magnification than confocal but confocal can image live moving subjects. In SEM the object of interest must be coated with gold so only dead things can be imaged.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.