What is the land ecosystem dominated by grass?
a. tundra
b. desert
c. forest
d. grassland user:
what is the defining abiotic factor of deserts?
a. the amount of rainfall
b. the amount of soil
c. the amount of air
d. the amount of sand

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms

What organ systems are working to you cool down after a workout?