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

[EX Q]: Passage: Identify evidence for electroweak unification. The quarks in a particle are confined, meaning individual quarks cannot be directly observed. Are gluons confined as well? Explain. Answer: directly observed
[EX A]: The quarks in a particle are confined, meaning individual quarks cannot be what?

[EX Q]: Passage: Only the top 200 meters or so of water receive enough sunlight for photosynthesis. This part of the water is called the photic zone. Below 200 meters, there is too little sunlight for photosynthesis to take place. This part of the water is called the aphotic zone. In this zone, food must come from other sources. It may be made by chemosynthesis, in which microorganisms use energy in chemicals instead of sunlight to make food. Or, food may drift down from the water above. Answer: photic zone
[EX A]: What is the top part of water able to receive enough sunlight for photosynthesis called?

[EX Q]: Passage: Angiosperm success is a result of two novel structures that ensure reproductive success: flowers and fruit. Flowers allowed plants to form cooperative evolutionary relationships with animals, in particular insects, to disperse their pollen to female gametophytes in a highly targeted way. Fruit protect the developing embryo and serve as an agent of dispersal. Different structures on fruit reflect the dispersal strategies that help with the spreading of seeds. Answer: fruit
[EX A]:
Angiosperm success is a result of two novel structures that ensure reproductive success: flowers and this?