what substance do they take in and what substance are excreted?

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Biology

2007-02-27 00:42:25 · 6 answers · asked by C'ley 1 in Science & Mathematics ➔ Biology

vague question.. who's "they"??

2007-02-27 02:46:22 · answer #1 · answered by speak_your_mind 3 · 0⤊ 0⤋

Nutrients
Faeces? Is that what you want?

2007-02-27 08:45:33 · answer #2 · answered by celianne 6 · 0⤊ 0⤋

insufficient data..

2007-02-27 08:50:31 · answer #3 · answered by Nikko 2 · 0⤊ 0⤋

Define "they".

2007-02-27 08:49:51 · answer #4 · answered by Snoopy 5 · 0⤊ 0⤋

skin = microbes
fingerprints = oil and pattern
depends wat substance you are refering not much info given

2007-02-27 08:45:23 · answer #5 · answered by Anonymous · 0⤊ 0⤋

?? poop?

2007-02-27 08:45:02 · answer #6 · answered by Anonymous · 0⤊ 1⤋