Tamilnadu BoardEnglish MediumSTD 12Bio ZoologyEvolution.3 Marks
Question
What are moulds and casts?
✓
Answer
Even after disintegration, the body of an animal might leave indelible impression on the soft mud which later becomes hardened into stones. Such impressions are called moulds. The cavities of the moulds may get filled up by hard minerals and get fossilized, which are called casts.
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