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.
Determining Bed Size. 1  1. Determine if your small bed is a twin. Most twin beds are 39 inches (99 cm) wide, while a ânarrowâ twin is 36 inches (91 cm) wide. 2  2. Move on to a full size bed if the bed is 54 inches (137 cm) wide. It should also be 75 inches (191 cm) long. 3  3. Increase your size to a queen bed if the width is 60 inches (152 cm).