Q: Answer the question

Which of the following is an example of a container that is filled with a pure substance rather than with a mixture?

A: a balloon filled with helium

Q: Answer the question

A factory in Japan had been dumping mercury into Minamata Bay. Certain microorganisms in the water were able to change the mercury into a form that the plankton could use. Which most likely happened next?

A: The mercury passed through the food chain.

Q: Answer the question

Genetically modified plants with new characteristics have been produced through genetic engineering methods. What impacts have resulted from the use of genetically modified plants?

A:
increases in resistance to herbicides, insects, and viral diseases