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Symmetry, in biology, the repetition of the parts in an animal or plant in an orderly fashion. Specifically, symmetry refers to a correspondence of body parts, in size, shape, and relative position, on opposite sides of a dividing line or distributed around a central point or axis.
- The Editors of Encyclopaedia Britannica
Apr 21, 2013 · Most animals have bilateral symmetry—which means that they can be split into two matching halves, if they are evenly divided down a center line. Even humans possess bilateral symmetry, and some scientists believe that a person’s symmetry is the most important factor in whether we find them physically beautiful or not.
Jun 14, 2020 · Examples of bilateral symmetry in the animal world include worms and snails, lobsters, cats, seals, turtles, and humans. The anatomical position – bilateral symmetry All you need to do is image a line through its middle – if the shape either side is a mirror image of the other, the organism, plant, molecule, microorganism, house, window, anything at all, is bilaterally symmetrical.
Aug 4, 2022 · Point Symmetry, or Origin Symmetry, or Central Symmetry is a type of symmetry where an object or shape looks the same when rotated 180° (a half-turn) around a central point. In this article, we will discuss Point Symmetry in detail including its definition, examples, as well as some real-life examples in nature as well.
Feb 17, 2023 · Many flowers exhibit radial symmetry. Flower petals extend from a central axis in a radial pattern. The segments of an orange, the seed distribution in kiwi fruit, and the five-pointed star of an apple core show a radial pattern. In animals, two phyla – cnidarians and echinoderms exhibit radial symmetry.
Nov 13, 2020 · Leaves of plants are also structured with bilateral symmetry, even though the symmetry may not be exact. These are leaves of the wild mulberry ( Trimeria grandifolia ), photographed in our garden. Prominently symmetrical in an unusual set of matching pairs and with each leaf being bilaterally symmetrical too, are freshly sprouted leaves of the toad tree ( Tabernaemontana elegans ), which is ...
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Dec 22, 2023 · Radial symmetry occurs around a central axis, so there are multiple lines of symmetry. A bicycle wheel is a great example! It is seen in animals and plants, particularly in flowers. You can also describe how many times the shape can be divided. For example, shapes with five-fold radial symmetry can be dived five times.
