Just like other living organisms, plants have found some pretty creative ways to defend themselves from those creatures that want to eat them. From homemade insect repellant to spikes, barbs, and bark, learn some of the ways that plants defend themselves.

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What makes one ecosystem strong and another weak? It’s biodiversity: ecosystem diversity, species diversity, and genetic diversity. That means nature often favors diversity at all levels: in the system, among its species, and in the genetics of those species.

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Cacti are amazing plants that evolved to keep themselves safe and healthy through their adaptations. They aren’t just prickly desert trees but complicated vegetation that survives harsh conditions like nothing else.

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Ask any adult you know: why do leaves change colors in the fall? I bet they won’t know. After this video, you’ll know more than they do.

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