query: What is the mechanism behind plants losing their leaves?
positive_passages.docid: 149729
positive_passages.text: What mechanisms tell temperate trees when to drop leaves?
negative_passages.docid: 38531
negative_passages.text: nice empty nodes broken by forest 2.0?
negative_passages.docid: 145238
negative_passages.text: Where does the energy required to stop a moving body come from and go?
negative_passages.docid: 117077
negative_passages.text: How would a plant sprout and grow in a zero gravity environment?
negative_passages.docid: 83527
negative_passages.text: What causes a partial blackout?
negative_passages.docid: 114983
negative_passages.text: What chemicals and structures control the *direction* of plant growth in leaves, stems and roots?
negative_passages.docid: 30301
negative_passages.text: What is a word that means "the outcome resulting from a lack of action"?
negative_passages.docid: 143852
negative_passages.text: What determines the size of a straw/pipe to stop a liquid running out of it when closing one end of it?
negative_passages.docid: 132426
negative_passages.text: Why do objects sometimes fall on their own?
negative_passages.docid: 153086
negative_passages.text: How do "Perfect" Fruits work?
negative_passages.docid: 137852
negative_passages.text: How does TREE(3) grow to get so big? (Laymen explanation)
negative_passages.docid: 118938
negative_passages.text: Number of leaves in a tree (all types of trees)
negative_passages.docid: 77680
negative_passages.text: How do Natures work?
negative_passages.docid: 14354
negative_passages.text: Mass defect- From where mass is being lost?
negative_passages.docid: 92511
negative_passages.text: How to find which materials use a missing texture?
negative_passages.docid: 140182
negative_passages.text: Are plants creatures or objects?
negative_passages.docid: 5177
negative_passages.text: If a tree falls in the forest