This picture shows the skeleton of an animal. what best describes what the living animal had?
a. a backbone
b. radial symmetry
c. bilateral symmetry
d. asymmetry

When species lose their habitats they may..

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

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.