What does nephrology study? a) The kidneys b) The liver c) The blood

What percentage of animal species are invertebrates? a) About 50% b) About 95% c) About 90%

What is the chemical symbol for the element mercury? a) Hg b) Mg c) Me

Which of these is the main way that ocean tides are created? a) The rotation of the Earth on its axis b) The gravitational pull of the moon c) The gravitational pull of the sun

What set of terms correctly represents an increasing order of complexity and size in living things? a) atom, molecule, organelle, organism, cell b) molecule, cell, tissue, organ, organism c) organelle, tissue, cell, organ, individual

The hardest substance available on earth is a) Diamond b) Platinum c) Rocks

What is it called when light changes direction after leaving a lens? a) Reflection b) Refraction c) Diffraction

The green pigment in plants that is capable of absorbing the sun's energy is a) Porphyrin b) Beta carotene c) Chlorophyll

True or False? It is the father’s gene that decides whether the baby is a boy or a girl.

The ‘Pascal’ is a unit measurement of what? a) Pressure b) Weight c) Temperature

What does 3 squared equal? a) 6 b) 12 c) 9

What does a light-year measure? a) Brightness b) Time c) Distance

Which is considered to be the computers short-term memory? a) REM b) ROM c) RAM