What does the shift in carbon isotope values in marine shells indicate about the driving force for the abrupt warming 55 mya? (a) a spike in carbon dioxide occurred at the time of the warming. (b) large quantities of methane were responsible. (c) solar variability increased during the period. (d) a and/or b may be correct. (e) none of the answers is correct.

Which of the following statements comparing electron microscopy and light microscopy is false? which of the following statements comparing electron microscopy and light microscopy is false? both the electron microscope and the light microscope use the same wavelengths for illumination. images produced by light microscopes can be in color, whereas electron microscope images are black and white unless they are artificially colored. the electron microscope has greater resolution than the light microscope. electron microscopes can allow examination of viruses and internal cell structures, whereas light microscopes are limited to objects that are 0.5 micrometers and larger. request answer