Preening is the act of grooming and maintaining their feathers.
100
What is a mammary gland
A mammary gland is in a female mammal, a gland that secretes milk.
200
What is molting?
Molting is the shedding of the exoskeleton.
200
What is a Diaphragm?
A Diaphragm is a dome-shaped muscle that is attached to the lower ribs and that functions as the main muscle in respiration.
300
What is a down feather?
A down feather is a soft feather that covers the body of a young bird. Provides insulation for the adults.
300
What is a placental mammal?
A placental mammal is a mammal that nourishes its unborn offspring.
400
what is a lift?
A lift is an upward force on an object that moves in a fluid.
400
What is a gestation period?
A gestation period is in mammals, the length of time between fertilization and birth.
500
What is brooding?
Brooding is when the adult sits and covers the eggs.
500
What are the seven characteristics of mammals?
The seven characteristics of mammals are making milk, breathing air, endothermic, having hair, specialized teeth, sexual reproduction, and large brains.