Fusion reactions occur between what kinds of elements? a. two very large nuclei b. two very large uranium isotopes c. very fast moving electrons ' d. very fast moving neutrons e. very small atoms

The energy needs of a human population are not affected by

How does deforestation affect the water cycle? a. it increases the amount of runoff b.it increases the amount of percolation c. it increases the amount of transpiration d. it increases the amount of precipitationa it increases the amount of runoff

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.