Q: The leaves of all of what type of plants have two basic parts in common: the blade and petiole? A:
OPTIONS:
- perennials
- deciduous
- evergreen
- flowering plants

Answer: flowering plants

Q: What happens to a species when all of the individuals die out or evolve into a different species? A:
OPTIONS:
- accumulation
- selection
- depletion
- extinction

Answer: extinction

Q: What substances, which are distinct from acids and bases, form when ions form ionic bonds? A:
OPTIONS:
- oils
- vitamins
- water molecules
- salts

Answer:
salts