Which characteristic could be used to identify a biome? a. the complexity of the food web in the region. b. types of endangered species that live there. c. amount of precipitation the region receives. d. the history of human impact on the region.

Which are forms of nitrogen that are usable by humans

My question says on my assignment. read the following scenarios and decide which of the properties of life are being described. the first one is. katherine stopped on the way to school to grab some donuts. 2. because a dog cannot sweat, it has to pant in order to stay cool. 3. an elephant trun had no bone but 4,000 muscles. i have no idea what i am supposed to anwer. i can't find the answer in my notes or book that i can understand anyway

9. the history of life on earth is recorded in