6. Patterns in nature
a. Pineapples , sunflowers (stalk, head), in chapter 6. See also Tara's "A Quest For The Sacred Golden Pineapple, Pine Cone and Artichoke"
b. Math in Bubbles
c. Nautilus shell (also see spirals above)
e. The ratio of Surface area / Volume (in chapter 6, see also the answer page) of Cuiseaire Rods' to explain why rats are nocturnal animals.
f. According to studies reported in The Journal of Experimental Biology #203, falcons, when attacking prey, fly along spiral paths! This was reported in Science Vol. 290, Dec. 8, 2000.
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For references see "On Growth and Form" by D'Arcy Thompson,
"On Size and Life" by McMahon and Bonner, and
"Patterns in Nature" by Stevens
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