BIO205H5 Lecture Notes - Lecture 6: Visual Acuity, Forage Fish, Bighorn Sheep

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5 Feb 2015

Document Summary

Lecture 6 - animal adaptations: animals adapt to their environments as well as plants. An extreme example is the wood frog which freezes in the winter time. Its heart rate stops and it goes into hibernation. In the spring, it begins to thaw, undamaged because of its specialize cells which can control ice formation. It"s now the first one back into the pond, which is advantageous because there is less competition at this time. It"s able to do this because it has cryoprotectant, i. e. glucose in its cells and because it can control reduction of water loss. It has very little access to water through rivers or ponds, so it"s adapted to spending more time in the shady mountain/ shrub area during the hottest parts of the day. They avoid areas over 35 , because over this temperature they have to lose water in order to survive.