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Some male birds and mammals congregate in communal courting grounds called leks.
Platycnemididae are a family of damselfly called white-legged damselflies.
The illusory bands visible in this figure are often called Mach bands, although Mach used a ...
Horizontal stroking to thigh from superior to inferior. Lift tissues as hands cross over top of ...
People with normal color vision see the number 29 in the chart; however, those who are color-blind c
Different forms of a gene are called alleles