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Author Question: Which of the following are entirely, or partly, composed of calcium carbonate? A (Read 1446 times)

Charlie

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on: Aug 5, 2013
Which of the following are entirely, or partly, composed of calcium carbonate?
A) spicules of siliceous sponges
B) coral animals' exoskeletons
C) molluscs' mantles
D) insects' cuticles
E) nematodes' cuticles


camila

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Reply #1 on: Aug 8, 2013
Answer has to be B, trust me!


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Charlie

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Reply #2 on: Oct 18, 2013
Wonderful, you were right, thank you so much.


Laurenleakan

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Reply #3 on: Feb 18, 2015
Thank you!


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