The periodic table is based on an element's
a. atomic number.
b. molecular size.
c. molecular mass.
d. atomic mass

Injuries in the environment are a result of

Fill in the blank with the correct sphere label. a: ⇒ geosphere b: ⇒ biosphere c: ⇒ hydrosphere

Select the correct answer. what does the hardy-weinberg principle relate to? a. chances of survival of an organism b. frequency of alleles in a population c. natural selection in a species d. causes of evolution among organisms