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The cell membrane.
substances
the round n oval structure in a cell that contains the chromosomes are nucleus.
An abscess contains pus, not urine. The two are very different substances.
state that from natural sources contains a variety of dissolved substances naturally occuring(mineral salts;oxgen;organic matter)
The cell membrane.
It contains over 390 miles of mapped passageways.
contains enzymes and other substances
The umbilical cord contains blood vessels which carry substances to and from the placenta and thence from the mother.
ores
substances
The thesis statement.
Since aluminum is a chemical element it contains no other substances.
Co2
oxygen
The cell nucleus is the structure that contains most of an organism's DNA.
Yes.