IN: The first ideas about light being used in photosynthesis were proposed by Colin Flannery in 1779 who recognized it was sunlight falling on plants that was required, although Joseph Priestley had noted the production of oxygen without the association with light in 1772. Cornelis Van Niel proposed in 1931 that photosynthesis is a case of general mechanism where a photon of light is used to photo decompose a hydrogen donor and the hydrogen being used to reduce CO . Then in 1939, Robin Hill showed that isolated chloroplasts would make oxygen, but not fix CO showing the light and dark reactions occurred in different places. Although they are referred to as light and dark reactions, both of them take place only in the presence of light. This led later to the discovery of photosystems I and II.
can light reactions take place in the dark?

OUT: no

IN: Sunlight is a portion of the electromagnetic radiation given off by the Sun, in particular infrared, visible, and ultraviolet light. On Earth, sunlight is filtered through Earth's atmosphere, and is obvious as daylight when the Sun is above the horizon. When the direct solar radiation is not blocked by clouds, it is experienced as sunshine, a combination of bright light and radiant heat. When it is blocked by clouds or reflects off other objects, it is experienced as diffused light. The World Meteorological Organization uses the term ''sunshine duration'' to mean the cumulative time during which an area receives direct irradiance from the Sun of at least 120 watts per square meter. Other sources indicate an ''Average over the entire earth'' of ''164 Watts per square meter over a 24 hour day''.
is sunlight the same thing as visible light?

OUT: no

IN: In the United States, between 1997 and 1999, 539 births were reported among mothers over age 50 (four per 100,000 births), with 194 being over 55.
can a 56 year-old woman get pregnant?

OUT: yes

IN: Six of the eight champions have won one of their titles while playing in their own homeland, the exceptions being Brazil, who finished as runners-up after losing the deciding match on home soil in 1950 and lost their semi-final against Germany in 2014, and Spain, which reached the second round on home soil in 1982. England (1966) won its only title while playing as a host nation. Uruguay (1930), Italy (1934), Argentina (1978) and France (1998) won their first titles as host nations but have gone on to win again, while Germany (1974) won their second title on home soil.
has the host country ever won world cup?

OUT:
yes