*8. Nathan was planning an experiment to test if plants could live in an environment with high oxygen concentration. What are some possible questions Nathan could ask regarding his control set-up for the experiment? ​

How water is moving through the ecosystem ?

What are levels of ecology and how can we remember them

Fossils of ancestors of the modern horses show a small 4-toed almost dog-like browsing animal named eohippus over time the horses got larger lost toes and changed to a grazing diet what is the best explanation of why this change occurred