Why do trees in deciduous forests drop their leaves in the winter?
a. It protects them from water stress. b. Winter is too cold for photosynthesis. c. The sun doesn t shine in the winter. d. None of the above. 26. Overall “productivity” refers to the total amount of fixed carbon (the product of photosynthesis) that can be produced in a given area. What environment is among the highest productivity environments on Earth? a. Arctic tundra. b. Desert. c. Coniferous forest. d. Salt Marsh. 27. The Chesapeake Bay is one of the largest examples in the world of a body of water that is open to the ocean but has shallow water and reduced salinity because of the influx of fresh water from the land. What term is used to describe such a habitat? a. Swamp. b. Canal. c. Peninsula. d. Estuary. 28. What kinds of photosynthetic organisms would you expect to find in deep waters in the center of the Chesapeake Bay? a. Bay grasses, such as Spartina and Azolla. b. Unicellular algae, such as diatoms and dinoflagellates. c. Marsh grasses, such as Typha and Welwitschia. d. Xe
