Radial symmetry is often exhibited by animals having [1994]a)one openi...
In radial symmetry – body is cut longitudinally through any radius into two equal halves. Present in sessile animals i.e. star fish that live in the sea bottom.
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Radial symmetry is often exhibited by animals having [1994]a)one openi...
Radial Symmetry in Animals with Sedentary Living
- Radial symmetry is a type of symmetry where an organism is symmetrical around a central axis, like spokes on a wheel.
- Animals with radial symmetry exhibit this characteristic due to their sedentary lifestyle and habitat.
- These organisms are typically found in benthic environments, such as the ocean floor, where they are attached or rooted in place.
Alimentary Canal
- Animals with radial symmetry often have a single opening for their alimentary canal, serving both as a mouth and an anus.
- This simplicity in their digestive system is advantageous for organisms that do not move around much and do not require complex feeding mechanisms.
Aquatic Mode of Living
- Many animals with radial symmetry live in aquatic environments, where they can easily filter feed or absorb nutrients from the surrounding water.
- The radial symmetry allows these organisms to efficiently capture food particles from any direction.
Ciliary Mode of Feeding
- Radially symmetrical animals often use cilia or other structures to capture food particles and direct them towards their mouth.
- This feeding mechanism is well-suited for organisms that live sedentary lifestyles and rely on the surrounding water for food.
In conclusion, animals with radial symmetry, especially those with sedentary living habits, typically exhibit characteristics such as a single opening of the alimentary canal, an aquatic mode of living, and a ciliary mode of feeding. These adaptations help them thrive in their benthic environments and efficiently obtain nutrients despite their immobile nature.
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