How is the history of the development of the cell theory related to the scientific process

How do the 2 types of endoplasmic reticulum differ?

What word is used to describe differences of individual organisms

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.