Given a scientific passage and an answer, generate a question for the given answer.

Passage: The combined gas law relates pressure, volume, and temperature of a gas. Answer: combines gas law
Which law relates the pressure, volume, and temperature of a gas?

Passage: Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Answer: four
How many valence electrons does carbon have?

Passage: All plants have a characteristic life cycle that includes alternation of generations . Plants alternate between haploid and diploid generations. Alternation of generations allows for both asexual and sexual reproduction. Beginning with the diploid sporophyte , spores form from meiosis. Asexual reproduction with spores produces haploid individuals called gametophytes , which produce haploid gametes by mitosis. Sexual reproduction with gametes and fertilization produces the diploid sporophyte. A typical plant's life cycle is diagrammed in Figure below . Answer: diploid sporophyte
What does sexual reproduction with gametes and fertilization produce?