a human skin cell divides by - ANS - mitosis
\a perpetual motion machine can never be built because it's not possible to eliminate?? - ANS -
elasticity
\According to their locations on the Periodic Table, argon (Ar) and neon (Ne) are
A. ionic
B. radioactive
C. liquid metals
D. noble gases - ANS - D. noble gases
\Any astronomical body that revolves around a larger body is called
A. a nova
B. a comet
C. a satellite
D. an astroid
E. a meteoroid - ANS - C. a satellite
\By definition, an aquifer is
A. a layer of sedimentary rock formed by water deposits
B. an ocean floor consisting of unconsolidated sediments and muds
C. river bottom made up of gravel and sedimentary rock
D. permeable rock that contains or carries water - ANS - C. river bottom made up of gravel and
sedimentary rock
\if you place bean seeds between moist paper towels and watch the stem and leaves appear
you will see a demonstration of ? - ANS - germination
\In a balanced aquatic ecosystem, which of the following would have the greatest population?
A. fish
B. crabs
C. sharks
D. plankton - ANS - D. plankton
\In chemistry, to be classified as an organic substance must contain
A. sugar molecules
B. sodium atoms
C. carbon atoms
D. water molecules - ANS - C. carbon atoms
\Regeneration in man is limited to
A. reproduction