What types of rocks were used to construct the time scale?

What are the formed elements (cell or parts of cell) in blood and what are their functions ?

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.

Which animal is a producer in this ecosystem