Science

HELP!!!

Cellular examination of a cyanobacterium and a diatom reveals that the diatom has (which structure?) that is absent in the cyanobacterium?
a. DNA
b. chloroplasts
c. plasma membrane
d. a cell wall with peptidoglycan
e. all of the above


Since this is not my area of expertise, I searched Google under the key words "cyanobacterium diatom anatomy" to get these possible sources:

http://www.mbari.org/staff/conn/botany/phytoplankton/phytoplankton_diatoms.htm
http://www.uic.edu/classes/bios/bios104/mike/bacteria01.htm
http://www.publish.csiro.au/?act=view_file&file_id=FPv29n3toc.pdf
http://stri.discoverlife.org/mp/20q?search=Algae
http://ebiomedia.com/prod/algaeguide1.html

I hope this helps. Thanks for asking.

Thank you!

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asked by John

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