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Tyrel Wiegand ∙
to show the way to food
photoreceptors
memes
endoskeleton
worms
Social behavior consists of complex interactions within groups.
Group hunting by wolves
Altruism is a form of self-sacrificing behavior.
The person and their attitude promotes altruistic behavior.
They had a large variety of farm products
Imprinting by geese
internal fertilization
Gas exchange