Andrew's students wondered why cacti would have an adaptation like needles to defend against animals. After all, most plants don't have needles. They wondered if the answer had to do with cacti growing in the desert where water is scarce. They thought that maybe they could find out by opening up a cactus and seeing what is inside. So that's what they did...
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| Be careful....that might hurt. |
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| On to dissecting other kinds of plants... |
Thanks for sharing these pictures, Andrew.
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