1. List three types of single-celled organisms. 2.In your own words, explain why an earthworm cannot survive if it were cut in half. 3.What are the three principles of the cell theory?

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.

Idon’t know the answer and i’ve been stuck on it for a while now skskskskks

If animal agriculture was eliminated, how much grain would become available for human consumption?