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Module 16: Reptiles, etc.

Feathers with smooth barbules but no hooked barbules
A poison that attacks the red blood cells and blood vessels, destroying circulation
Feathers with hooked and smooth barbules, allowing the barbules to interlock
A structure that allows an embryo to be nourished with the mother's blood supply
A shelled, water-retaining egg that allows reptile, bird, and certain mammal embryos to develop on land
The period of time during which an embryo develops before being born
Specialized organs in mammals that produce milk to nourish the young
An organism that is internally warmed by a heat-generating metabolic process
A poison that attacks the nervous system, causing blindness, paralysis, or suffocation