question: Write a question you would see in a school textbook. OPTIONS:
- CO2.
- O2.
- H2O.
- NaCl.
answer: Which of the following is a harmful waste material that leaves the blood and travels through the lungs before leaving the body?

An example of a grad-school level question?
Cells come in two basic types, prokaryotic and eukaryotic. Which cell structure is found in both prokaryotic and eukaryotic cells?

I just took a test in school today. What question was I asked?

Question I was asked: Over several years, a scientist successfully isolates a species of flower for white color. This year, when the new generation of flowers blooms, one yellow flower is found in the population. Which is the best reason for the appearance of a new flower color within the species?

Random question?

Gregor Mendel studied ratios related to traits passed from parent pea plants to offspring pea plants. Mendel used large numbers of plants to avoid "sampling error." This changed the way scientists studied genetics because it included ideas of

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Question generated: When the pesticide DDT was first used, it killed nearly every mosquito it touched. Within a few years, however, many mosquitoes became resistant to DDT and survived. What enabled this to happen?

question: Write a question you would see in a school textbook. OPTIONS:
- solid at room temperature.
- liquid at room temperature.
- lighter than all other metals.
- heavier than all other metals.
answer:
According to the Periodic Table of the Elements, mercury (Hg) is different from other metals because mercury is