rays
Or the fins help the fish stay up in the water.
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Mainly it is the cell wall. It surrounds the cell
A rigid structure that supports other parts of a building is called a frame. Frames are typically made of steel or concrete and provide stability and strength to the overall structure. They help distribute the load of the building and resist forces such as wind and earthquakes.
The flaps on a fish are called fins, which help the fish to maintain balance, steer, and move through water. There are different types of fins on a fish, such as dorsal fins, pectoral fins, pelvic fins, anal fins, and caudal fins.
The stem/trunk of the plant supports the branches and leaves. It provides structure and transport for water and nutrients throughout the plant.
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The pelvic fin
Limbs and fins are considered homologous structures because they share a common evolutionary origin despite their different functions. Comparative anatomy reveals similar bone structures in the forelimbs of mammals and the fins of fish, indicating that they evolved from a common ancestor. Additionally, embryological studies show that limb and fin development is guided by similar genetic pathways, reinforcing their shared lineage. This evidence supports the idea that limbs and fins have diverged from a common ancestral structure through evolution.
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the pie system
The spine.
where is the support in a frame structure
A shell structure supports its self and a frame structure does not support it self.
Fish do not have shoulder blades like mammals do. Instead of a shoulder girdle, they possess a structure called the pectoral girdle, which supports their pectoral fins. This structure is quite different from the bony shoulder blades found in land animals and is adapted to their aquatic environment. The pectoral girdle helps fish maneuver and stabilize while swimming.
The pelvis is the bowl-shaped structure that supports the spine.
Pectoral fins are paired fins located on the sides of fish and some aquatic animals, such as sharks and rays. They are primarily used for steering, balance, and propulsion in the water. In many species, pectoral fins can also play a role in communication and mating displays. The structure and function of these fins can vary widely among different species, reflecting their diverse adaptations to specific environments.
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