Micro Organisms
Which of the following is not true for eukaryotic cells?

Chromosomes contain histones
Gas vacuoles are present
Chloroplasts and mitochondria contains 70S ribosomes
Nucleus is bounded by nuclear membrane

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Micro Organisms
Eukaryotic cell organelles first emerged

from a specialized lineage of cells within the kingdom Protista
when bacteria made their first attempts at reproduction
when prokaryotes engulfed each other and became interdependent
just before the origin of the animal and fungal kingdoms

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Micro Organisms
The unifying feature of the archaea that distinguishes them from the bacteria is

presence of a cell wall containing a characteristic outer membrane
habitats which are extreme environments with regard to acidity
absence of a nuclear membrane temperature
cytoplasmic ribosomes that are 70S

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