In terms of organisms, photosynthesis occurs in autotrophes that contain the green pigment chlorophyll. This would include the entire plant kingdom, half of the Protista (the algae), & half the Moneran Kingdom (the blue-green algae).
A standard twin mattress is 39 by 75 inches. A king is 76 by 80 inches. This means that a headboard for a king bed is going to be about 76 inches or wider, plenty wide enough to go along the length of a twin bed. Headboards are often slightly wider than the bed for which they are made.
Length and width dimensions for mattresses and box springs have a tolerance range of Â± 1â for standard sizes (Twin, Full, Queen & King) and Â± 1 Â½â for custom sizes (Twin XL, Full XL, California King, etc.). Twin Twin size mattresses are the smallest standard size available and are approximately 38 x 75. Twin XL Twin XL mattresses are approximately 38 x 80. Full Full size mattresses are approximately 53â x 75â. Queen Queen size mattresses are the most popular standard size available and are approximately 60 x 80. King King size mattresses are the largest standard size available and are approximately 76 x 80. California King California King size mattresses are longer and narrower than regular Kings and are approximately 72 x 84.