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

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

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Micro Organisms
Genetic and biochemical similarities between contemporary cyanobacteria and eukaryotic chloroplasts are accepted to mean that

eukaryotes evolved from archaea
cyanobacteria arose from chloroplasts which escaped from plant cells
oxygenic photosynthesis first evolved in eukaryotes
eukaryotes evolved from bacteria

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