Why are pollutants more harmful to tertiary (top) consumers as opposed to producers?

Which of the following is the sl unit used to measure temperature a. kilogram b. liter c. meter d. kelvin

Forensic scientists think they know the identity of a skeleton. what rule should they use to select a relative whose dna could be used to try to confirm the identity?

Why is it bad that some cancer cells can make their own growth hormones?