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A water company uses lab tests on the water supply before sending the water through pipes to people's homes. How do these lab tests help people?

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Question generated: Which is the best way a science student can help to maintain laboratory equipment?

Problem: Write a question you would see in a school textbook.

Answer: A student provides the following directions for brushing teeth: Turn on the water. Fill the glass with water and leave the water running. Put toothpaste on the toothbrush. Brush for two minutes. Rinse mouth with the water from the glass. Rinse the toothbrush with the running water. Turn off the water. Which change in these directions would conserve the most water?

question: Write a question you would see in a school textbook. OPTIONS:
- the pond water
- the watercress plants
- the minnows
- the crayfish
answer: A spring-fed stream forms a pond that contains watercress plants, minnows, and crayfish. The pond receives 5 hours of direct sunlight every day. Which of the following is an abiotic factor in this ecosystem?

An example of a grad-school level question?
Genes are located on chromosomes which are composed of

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Which resource is most likely found in large amounts in forest ecosystems?