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Why does the aboral surface of the starfish look clean when compared with dermal surfaces of other marine organisms?
The aboral surface of a starfish appears clean primarily due to the presence of a thin layer of cilia and mucus that help to remove debris and prevent the accumulation of microorganisms and sediment. Additionally, the starfish's unique anatomy, including its ability to regenerate and maintain its body, contributes to a less cluttered appearance. This contrasts with the dermal surfaces of many other marine organisms, which may harbor more algae, parasites, or organic material due to differences in their ecological roles and morphologies.
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Why does a vital function of pedicellariae clean the surface of a starfish?
Pedicellariae of a starfish help to keep its surface clean by removing debris, parasites, and algae. This cleaning function is crucial for maintaining the health of the starfish and preventing infections or blockages on its skin.
The ventral surface of a starfish is called?
the ventral surface of a starfish is called oral You Jerk.
Which kind of surface can radiate heat quickly to the surroundings?
Smooth and shiny surfaces such as metal or glass are good at radiating heat quickly to the surroundings due to their high thermal conductivity. Additionally, surfaces with dark and matte finishes tend to radiate heat more efficiently compared to light and shiny surfaces.
What is the lower surface of the starfish called?
The lower surface of a starfish is technically called the ventral side. This is where both the mouth and stomach is located on the starfish.
How does water affects surface friction?
Water can decrease surface friction by creating a slippery layer between two surfaces. When water is present, it can reduce the grip or traction between surfaces, leading to lower friction. This is why wet surfaces can be more slippery compared to dry surfaces.
Which surface will produce least amount of friction?
A smooth surface will produce the least amount of friction compared to a rough surface. Friction is caused by the resistance when two surfaces slide against each other, and smoother surfaces have fewer microscopic irregularities that create friction. The coefficient of friction is lower for smooth surfaces.
What is the topside of a starfish called?
The upper surface of the starfish is called the aboral. The lower surface is called the oral.
What produces more heat rough surface and a smooth or surface two smooth surfaces or two rough surfaces or two surfaces with oil between them?
Two rough surfaces in contact will produce more heat due to increased friction compared to two smooth surfaces or a smooth and rough surface. Adding oil between two surfaces will reduce friction and heat generation.
What type of surface will produce the most friction?
Rough surfaces typically produce more friction compared to smooth surfaces. This is due to the increased contact points between the surfaces, resulting in more resistance to motion.
How is light reflected on rough surface?
Light is reflected on a rough surface in many directions due to the uneven surface structure. Each small section of the rough surface reflects light independently, leading to diffuse reflection instead of the regular reflection seen on smooth surfaces. This is why rough surfaces appear matte or less glossy compared to smooth surfaces.
What is the ventral surface of a starfish?
The bottom surface of a starfish (sea star) is referred to as the oral or actinal surface. The top side is referred to as the aboral or abactinal side.
Why friction does not occur in smooth surfaces?
It is wrong to say that friction doesn't occur in smooth surface.. As ideally, no such surface exists, which has 0 value of friction. We can say that the magnitude of friction force is less in smooth surfaces as compared to that in rough surfaces. Friction opposes the motion of a body. When we go to the molecular level, we can see that the surface of a plane is not smooth but rough.. We cannot see that roughness through naked eyes. But the amount of roughness differs from object to object. The so called smooth surfaces have less roughness as compared to un-smooth surfaces. Hence, the magnitude of friction is LESS in smooth surfaces...
