A scientist was investigating why several fish caught from a local stream displayed similar mutations. He found that the water temperature of the stream was elevated since an industrial plant began discharging heated water into the stream. The scientist concluded that increased water temperature during the egg phase led to the mutation in the fish. According to this conclusion, the mutation was caused by OPTIONS:
- an autoimmune disorder.
- a congenital defect.
- an environmental condition.
- an injury from a predator.
A: an environmental condition.

The starch and water molecules in potato cells are stored in what organelle? OPTIONS:
- mitochondrion
- nucleus
- ribosome
- vacuole
A: vacuole

A rock sample will most likely contain OPTIONS:
- plants.
- minerals.
- water.
- wood.
A: minerals.

Chinese and European societies can use different but effective technologies when addressing medical questions. What does this demonstrate? OPTIONS:
- Varied approaches can yield successful technologies.
- Not all technologies behave according to scientific laws.
- The development of science and technology are independent.
- Technology results more from practice than from scientific knowledge.
A:
Varied approaches can yield successful technologies.