Mercury is a beneficial element in the food chain.

True
False

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.

Which season occurs in the northern hemisphere when the sun is at its lowest point in the sky

How many structures do prokaryotic cells have in common with the eukaryotic cells? a. 2b. 3c. 4d. 5