Extract the answer to the question from the following context. Question: What is needed to prove the theory? Context: In the early 11th century, the Muslim physicist Ibn al-Haytham (Alhacen or Alhazen) discussed space perception and its epistemological implications in his Book of Optics (1021), he also rejected Aristotle's definition of topos (Physics IV) by way of geometric demonstrations and defined place as a mathematical spatial extension. His experimental proof of the intromission model of vision led to changes in the understanding of the visual perception of space, contrary to the previous emission theory of vision supported by Euclid and Ptolemy. In "tying the visual perception of space to prior bodily experience, Alhacen unequivocally rejected the intuitiveness of spatial perception and, therefore, the autonomy of vision. Without tangible notions of distance and size for correlation, sight can tell us next to nothing about such things."
Ans: vision

Extract the answer to the question from the following context. Question: What did Thierry Henry win for scoring 27 goals in the 2005-06 season? Context: The Golden Boot is awarded to the top Premier League scorer at the end of each season. Former Blackburn Rovers and Newcastle United striker Alan Shearer holds the record for most Premier League goals with 260. Twenty-four players have reached the 100-goal mark. Since the first Premier League season in 199293, 14 different players from 10 different clubs have won or shared the top scorers title. Thierry Henry won his fourth overall scoring title by scoring 27 goals in the 200506 season. Andrew Cole and Alan Shearer hold the record for most goals in a season (34) for Newcastle and Blackburn respectively. Ryan Giggs of Manchester United holds the record for scoring goals in consecutive seasons, having scored in the first 21 seasons of the league.
Ans: The Golden Boot

Extract the answer to the question from the following context. Question: Under protandry, observed in certain species, some females are made from? Context: In polygynous species with considerable sexual dimorphism, males tend to return earlier to the breeding sites than their females. This is termed protandry.
Ans: males

Extract the answer to the question from the following context. Question: What is usually not found in eukaryotic cells? Context: Once regarded as plants constituting the class Schizomycetes, bacteria are now classified as prokaryotes. Unlike cells of animals and other eukaryotes, bacterial cells do not contain a nucleus and rarely harbour membrane-bound organelles. Although the term bacteria traditionally included all prokaryotes, the scientific classification changed after the discovery in the 1990s that prokaryotes consist of two very different groups of organisms that evolved from an ancient common ancestor. These evolutionary domains are called Bacteria and Archaea.
Ans: membrane-bound organelles