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The ABC model of flower development is a scientific model of the process by which flowering plants produce a pattern of gene expression in meristems that leads to the appearance of an organ oriented towards sexual reproduction, a flower.
Sexual selection through female choice is perhaps a more difficult concept to apply to plants. There is evidence that females (or the female function of hermaphrodites) exercise choice, especially during fertilization. [2] These two mechanisms are the main driving forces of sexual selection in flowering plants.
Self-compatibility ( SC) is the absence of genetic mechanisms which prevent self-fertilization resulting in plants that can reproduce successfully via both self-pollen and pollen from other individuals. Approximately one half of angiosperm species are SI, [1] the remainder being SC.
Heterophoria is an eye condition in which the directions that the eyes are pointing at rest position, when not performing binocular fusion, are not the same as each other, or, "not straight". This condition can be esophoria, where the eyes tend to cross inward in the absence of fusion; exophoria, in which they diverge; or hyperphoria, in which ...
Stigma (botany) Diagram showing the stigma-style-ovary system of the female reproductive organ of a plant. The stigma is fixed to the apex of the style, a narrow upward extension of the ovary. The stigma ( pl.: stigmas or stigmata) [1] is the receptive tip of a carpel, or of several fused carpels, in the gynoecium of a flower .
2. Petunia. The trumpet-shaped blossoms of petunias provide easy access to the sweet nectar tucked inside, making them a convenient pit stop for hummingbirds. Petunias' vibrant colors, ranging ...
Heterostyly is a unique form of polymorphism and herkogamy in flowers. In a heterostylous species, two or three morphological types of flowers, termed "morphs", exist in the population. On each individual plant, all flowers share the same morph. The flower morphs differ in the lengths of the pistil and stamens, and these traits are not continuous.
Trioecy is a relatively common sexual system in plants, estimated to occur in about 3.6% of flowering plant species, although most reports of trioecy could be misinterpretations of gynodioecy. It is rare as well as poorly understood in animals.
But spare a thought for the team from Wales which has set itself the challenge of using more than 300 different species of plants. The Size of Wales garden is thought to be the most biodiverse ...
Where appropriate, prismatic correction can be used, either temporarily or permanently, to relieve symptoms of double vision. In specific cases, and primarily in adult patients, botulinum toxin can be used either as a permanent therapeutic approach, or as a temporary measure to prevent contracture of muscles prior to surgery