In plants, photosynthesis occurs mainly within the leaves. Since photosynthesis requires carbon dioxide, water, and sunlight, all of these substances must be obtained by or transported to the leaves. [ Carbon dioxide is obtained through tiny pores in plant leaves called stomata. Oxygen is also released through the stomata. Water is obtained by the plant through the roots and delivered to the. leaves through vascular plant tissue systems. Sunlight is absorbed by chlorophyll, a green pigment located in plant cell structures called chloroplasts.
Super Bowl XLIX, a thrilling contest that came down to an unbelievable interception in the fourth quarter, has become the most watched show in television history. According to numbers released by the ratings agency Nielsen, 114.4 million Americans tuned in to watch the Patriots beat the Seahawks 28 to 24 on Sunday.
According to Nielsen's measurements of the top network telecasts of all time, the top 20 most-watched TV episodes ever all date back at least a decade. For example, the Seinfeld series finale, in 1998 â which had a very mixed reaction â was the most recent episode to crack the top 100. Decades-old miniseries like Roots and The Thorn Birds and finale episodes of the most popular shows in TV history dominate the list. We compiled the data from Nielsen on the most-watched broadcasts ever to create this list of the top episodes of TV.