Hardwood and a softwood are terms related to seed formation. Angiosperms have and outer shell (acorn, walnut) are hardwoods. Gymnosperms without a covering are softwood. Balsa wood is one of the lightest, least dense woods there is, and it's considered a hardwood. science.howstuffworks.com…
Despite being 200 million years older there are only 1000 species of gymnosperms (cone-bearing plants) while angiosperms (flowering plants) have radiated into up to 400,000 different species since their evolution 160 millions years ago en.m.wikipedia.org/wiki/A…
The difference between hardwood and softwood has to do with how they reproduce, not the hardness of the wood, and that balsa wood - one of the softest woods - is a hardwood. gizmodo.com.au/2015/05/th…
Flowers have only existed for 160 million years en.wikipedia.org/wiki/Flo…
The difference in hardwood and softwood has to do with seeds and has nothing to do with how hard or soft the wood is. Balsa is a hardwood. science.howstuffworks.com…

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