Which of these causes rivers to flow toward the ocean?

a- erosion

b- latitude

c- gravity

d- tides

If scientists are wrong about earth's age based on radioactive material and the decay rates are really much faster, how would nuclear power plants be affected?

Which allele is expressed in the first-generation offspring of parents that have two different traits? a. the segregated allele b. the true-breeding allele c. the recessive allele d. the dominant allele

What vitamin gives carrots and sweet potatoes their orange color?