What is Isthmus ? . . . ​

The vegetation that thrives in the tundra is limited to a. mosses, barley, wheat, and corn. b. coniferous trees. c. dwarf shrubs, mosses, lichen, potatoes, and beans. d. mosses, lichen, algae, and dwarf shrubs.

What is the amount of organic matter in all living organisms in a habitat called?

8. compare the education of a sparta boy and an athenian boy. (2 points)