Which hummingbird adaptation is most advantageous for supporting their high metabolism?

Where can dna be found in a prokaryotic cell

What is the ecological role of food chains and food webs

Abird flies by moving its wings up and down. which two systems are most directly responsible for the movement of a bird's wings? a. skeletal and muscular systems b. respiratory and muscular systems c. skeletal and digestive systems d. respiratory and digestive systems