Cone
* Any cone third part of the cylinder with the same base and equal height.
* Most cone snails hunt worms and other snails, but a few eat fish
  - cones eat other mollusks, but a few evolved species hunt fish
* Most cones have basal diameters
  - centers
  - gravity
  - structures
  - surfaces
  - lie in the fovea, whereas peripheral vision is dominated by rods
* Some cones are so persistent they are overgrown by the wood of the tree.
* Some cones consist of actin filament
* Some cones contain nuts
  - ovules
  - pollen
  - ripe seeds
  - sporangiums
  - wing seeds
* Some cones convert energy
  - incident energy
  - fill with pollen
* Some cones have a harpoon that can give a lethal injection
  - ducts
  - flavour
  - functions
  - phases
  - plates
  - resin ducts
* Some cones produce edible seeds
  - evergreen trees
  - spores
  - toxins
  - protect heads
  - respond to red, others to green or blue
* adapt faster, so the first few minutes of adaptation reflect cone-mediated vision.
* allow a person to see colors
  - the brain to perceive colors
* also have a fragrant gummy resin
  - exudations of a fragrant gummy resin
* are a little different because they sense color
  - also modified leaves
  - cells which distinguish color
  - characteristic of late stage eruptions within the long life cycle of a volcano
  - especially dense at the fovea, the portion of the retina with the greatest visual acuity
  - essential for both detailed pattern perception and color vision
  - for color and rods are for black and white and dim light
  - highly concentrated in a region near the center of the retina called the fovea region
* are important for color vision and for seeing in bright light
  - visual acuity and color vision and are most numerous in nocturnal birds
  - large and very resinous and contain edible seeds
  - larger than other conifers
* are less sensitive than rods and more clustered near the centre of the retina
  - to light than rods and can tolerate more light
  - made up of many scales
  - mainly responsible for color perception
  - manifolds
  - more near the centre of the retina
  - most concentrated in the fovea
  - mostly in fovea, central region of retina
* are part of club moss
  - eyes
  - horsetails
  - photoreceptors in the retina that respond to bright light of different colors
  - physiologically normal and lollipops are pathologic
  - present in the horse retina suggesting that they have the capacity for color vision
  - presynaptic to horizontal cells and get inhibitory feedback from the same cells
  - produced at the margin of the disk
  - reactive to the three colors of red , blue , and green
  - receptive to pollen when fully open, a condition which lasts for only a few days
  - regarded as the receptors for day vision where as rods are the receptors for night vision
* are responsible for color perception
  - finely detailed vision
  - photopic vision
  - seeing fine details and for color vision
  - round shapes
  - sandalwood base for long and clean burning
* are sensitive to different frequencies of light
  - the amount of light entering the eye
  - similar in some ways to pyramids
  - slightly conical in shape and are more sensitive to bright light
  - smaller in size and have a characteristic oil droplet in their inner segments
* are the ones that are unevenly distributed
  - receptors for bright light and colour
  - reproductive structure in gymnosperms
  - second type of receptor
  - used more in twilight and dawn light while flying from or to the shelter
* attract crossbills.
* begin forming in about the fifth year.
* break and crack easily.
* can be any size
  - detect color, but the rods are more sensitive to light
  - get to be very large
  - retain viable seeds for years until a fire occurs
* come in three types according to the pigment that they contain
  - red, green, and blue that are sensitive to different wavelengths of light
* contain iodpsin.
* detect color and bright lights
  - colors in bright light, including black, white, and gray
* develop over two growing seasons
  - to the bud stage in the year prior to their use in reproduction
* diffuses light for a soft area illumination.
* dominate the response when the luminance level is high, and provide color perception.
* enable light adaptation, color perception, and fine detail perception.
* exude a fragrant gummy resin.
* frequently have elongate pits at their summits.
* function best in daylight, rods in twilight and dark
  - in bright light and are responsible for both sharp and color vision
  - well in brightly lit surroundings, perceive colour and much detail
* generally connect to one ganglion cell, and serves acute vision
  - persist on the tree for one to two years after seed fall
  - higher thresholds than rods and function primarily in photopic or daylight vision
  - no enclosed ovary hence the name gymno meaning naked or bare
  - specialized pigments that are sensitive to either red, green, or blue
  - their apex at the first point of each cylinder record
* help see color and rods detect light
  - with color vision, and the finer details of our world
* includes sections.
* is an artifact
  - short for pyrometric cone, a way to measure heat in the kiln as it is working
* look very different from flowers but serve the same purpose.
* mediate vision at higher levels of illumination.
* normally feed on fish, worms or snails.
* pick up colour.
* provide better acuity than rods because they have lower convergence on the bipolar cells
  - central reading vision, and are responsible for color vision
* provide color perception and detailed sight, while rods detect motion and vision in dim light
  - vision in birds and people
  - colour vision and high visual acuity in bright light
* regulate day vision and function in color discrimination.
* respond better in bright light to wavelengths of color so they work mostly during the daytime
  - faster but can adapt only to a small extent
* respond to bright light and distinguish colours
  - brighter light and are responsible for color vision
  - dim light, whereas rods are stimulated by bright light
  - specific wavelengths of light
* scales open and seeds fall onto the bare ground that is rich with nutrients in the ash
  - gradually following heating
  - separating or cones disintegrating at maturity
* stay fresh because they are protected from contamination and moisture.
* synapse with horizontal and bipolar cells via flattened oval end-bulbs, called cone pedicules.
* usually fall from the tree shortly after seeds are shed.
* work best when there's lots of light, like during the day.
+ Sensation, Visual sense: Psychology :: Physiology
  * Light enters the eyes through the cornea. It then passes through the pupil, and is refracted by the crystalline lens of the eyes. Light is then channeled through the vitreous humour and then on to the retina. In the retina, there are two kinds of cells, rods and cones. Cones then, see colored structures. Cones are exceptionally abundant in the fovea. Cones are reactive to the three colors of red, blue, and green. Other colours are sensed as combinations of these.