Plant Structure
Which of the following observations is not used as evidence to support the concept of endosymbiotic origin of chloroplasts and mitochondria?

Both have their own DNA
Both have their own ribosomes
Both can live and function independently of the cell
Both strongly resemble prokaryotes, especially in size

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Plant Structure
Cellular metabolism is an example of

equilibrium metabolism
a series of reactions that defy the second law of thermodynamics
a series of reactions occurring under standard conditions
steady-state metabolism

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Plant Structure
The mitochondria were known in the nineteenth century to be osmotically active on the basis of evidence that

the mitochondrial matrix is hypertonic to the cellular cytoplasm
mitochondria are surrounded by a semi permeable membrane
mitochondria were derived from a symbiotic bacterium
the mitochondrial matrix is hypotonic to the cellular cytoplasm

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