Q: How many types of leptons are there? Choices: - nine - two - twelve - six A:
six

Q: Which landmark book on evolution via natural selection did charles darwin publish in 1859? Choices: - on the origin of mammals - on the ethnic of species - on various kinds of animals - on the origin of species A:
on the origin of species

Q: What term is used to describe the cellular structures responsible for protein synthesis? Choices: - chromosomes - chloroplasts - nuclei - ribosomes A:
ribosomes

Q: What substance flows over the land from precipitation or melting snow or ice? Choices: - nitrogen - lava - air - water A:
water