Random question?

Planets remain in orbit around the Sun because of

Generate a question

Question generated: Which of these environmental changes goes on for months or years?

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

Answer: A caterpillar changing into a butterfly is an example of

question: Write a question you would see in a school textbook. OPTIONS:
- cytoskeleton and cell membrane
- cytoplasm and Golgi apparatus
- nucleus and endoplasmic reticulum
- ribosome and central vacuole
answer: In eukaryotic organisms, interaction between which organelles is most important for cell shape, tensile strength, and communication between cells?

An example of a grad-school level question?
Felicia investigated whether water color affected how fast the water heated in sunlight. She poured tap water into five beakers and placed food coloring in four out of the five beakers. Felicia then used a thermometer to measure the temperature of the water in each of the beakers. Which of these was used as control in her investigation?

Random question?
Which of these items contains only a solution?