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Marat540 [252]
3 years ago
7

Identical twins have more similar sleep patterns than do fraternal twins, and North Americans are averaging less sleep than thei

r counterparts of a century ago. These facts best illustrate that sleep patterns are affected by both _______.
Biology
1 answer:
Ipatiy [6.2K]3 years ago
5 0

Answer:

Heredity and Environment

Have a good day!

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