The sections of the light spectrum which the âredâ and âgreenâ cones perceive overlap and this is why red and green colour vision deficiencies are often known as red/green colour blindness and why people with red and green deficiencies see the world in a similar way.
Boston Fern The most common indoor fern, Boston ferns are long-lived plants that can reach more than 5 feet tall and wide at maturity (though indoors they rarely reach that size). Fern breeders have released a large number of varieties -- from selections with golden fronds to fantastically frilled fronds.
Nonvascular plants (mosses, hornworts, liverworts) 2. Ferns. These are the most well represented of the seedless plants. Most ferns have fronds, compound leaves divided into several leaflets.As the frond develops it uncoils from a structure called a fiddle head.his plant had vascular tissue and a new type of reproductive structure called the seed. These plants contained these seeds in structures called cones. The leaves of most of the gymnosperms are needle-like structures. These needles contained a thick cuticle and reduced stomata.