Darwin Observe different species of an animal on separate Galápagos Islands Which animal did he observed

Is it considered muscle s ennervation if sympathetic fibers innervate the vessels within the muscle?

Several bird species feed in a certain species of tree. each bird species feeds in a different part of the tree. which statement is true of these bird species? a. they have adapted to different niches due to competition b. they have a carnivorous relationship with the tree species. c. they have adapted to different niches due to predation d. they have a symbiotic relationship with the tree species.

Crossing over is a method of (blank)?