Emperor penguins have the ability to 'recycle' their own body heat. The arteries and veins lie close together so that blood is pre-cooled on the way to a penguin's feet, wings and bill and warmed on the way back to the heart. Emperors' feet are adapted to the icy conditions
A situation where friction would be desirable is rubbing your hands together to make them warm in the winter time.
Any three characteristics of bacteria area
- lack of membrane-bound organelles
- unicellular
- small (usually microscopic) size.
It has 3 layers
an animal cell has no cell wall but a plant cell dose
it protects,support, and gives the plants their shape
