What are characteristics of polygenic traits? Select all that apply.

A. Traits are continuous across a range.

B. Traits are discrete.

C. Traits are always found in a 9:3:3:1 ratio.

D. On a histogram, traits distribute on a bell-shaped curve.

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.