Fill in the blank Fresh water lakes are used to help store fresh water for flood control, irrigation, hydroelectric power and

A. recreation (boating, fishing, swimming)

B. desalination

C. waste disposal

What were the main components of earth’s earliest atmosphere? oxygen and ammonia hydrogen and helium oxygen and nitrogen hydrogen and nitrogen

2. which of the following statements does not accurately describe stem cells? a. embryonic stem cells make up the inner cell mass of a blastocyst. b. with more research, stem cells may be used to repair or replace damaged cells. c. the use of stem cells is without any objections since it can be used in therapies to humans. d. adult stem cells are multipotent and can differentiate into many types of cells.

49 ! how are energy cycles and growth cycles related?