TASK DEFINITION: Given a scientific passage and an answer, generate a question for the given answer.
PROBLEM: Passage: For feeding, the insect head contains one pair of lower jaws and two pairs of upper jaws. Insects have also evolved a wide range of specialized mouthparts for eating certain foods. You can see some examples in Figure below . Answer: two pairs

SOLUTION: How many pairs of upper jaws do insects have?

PROBLEM: Passage: The Gaia hypothesis states that the biosphere is its own living organism. Answer: the gaia hypothesis

SOLUTION: What hypothesis states that the biosphere is its own living organism

PROBLEM: Passage: Chemical elements and water are recycled through biogeochemical cycles. The cycles include both biotic and abiotic parts of ecosystems. Answer: biogeochemical

SOLUTION:
Chemical elements and water are recycled through what cycle?