Botany for Beginners

ISBN: 9781330274804 出版年：2016 页码：312 Ernest Evans Forgotten Books

I. Living bodies are characterised by the nature of their external form. Their Shape is definite, and bounded more or less by curved surfaces. Non-living bodies are either amorphous, that is without shape or crystalline, that is bodies with a definite shape. Crystals are bounded by flat surfaces meeting in Sharp edges.