Which of the following is/are used to kill all microbes and endospores?
a) ethylene oxide
b) alcohols
c) chlorine
d) formaline
Explanation: requires 4-18hours exposure
EXERCISE:
Life on earth in its early years was not possible without prokaryotes because they were involved in……..
a) photosynthesis
b) respiration
c) soil forming
d) cell division
Super kingdom is also called……
a) protista
b) monera
c) domain
d) phylum
Archaea and bacteria do not share the following characteristics except……
a) cell wall constitution
b) ribosomal RNA
c) chemical compostion of membrane
d) autotrophy
Methanogenic archaea can survive in conditions which are…….
a) extremely hot
b) aerobic
c) highly saline
d) anaerobic
