Question

Сопротивление воды при передвижении рыбы уменьшается благодаря а) наличию боковой линиюб б) покровительственной окраски в) обтекатель формы тела г) органы обоняние

Answer 1

Название вещества, формула которого 

СН3─СН2─СН(СН3)─СН(СН3)─СОН 

Answer 2

В) обтекаемой формы тела

Answer 3

The Resistance of Water in Fish Movement

When it comes to the resistance of water during fish movement, there are several factors that contribute to a reduction in resistance. These factors include:

a) Presence of Lateral Line: Fish have a sensory organ called the lateral line, which runs along the sides of their bodies. The lateral line is responsible for detecting changes in water pressure and vibrations, allowing fish to navigate and detect prey or predators. This sensory system helps fish to streamline their movements and reduce water resistance.

b) Protective Coloration: Some fish species have evolved protective coloration, which helps them blend into their surroundings. This camouflage can reduce the visibility of the fish to predators, making it harder for them to detect and catch their prey. By reducing the chances of being detected, fish can move more freely and efficiently through the water, experiencing less resistance.

c) Streamlined Body Shape: Fish have evolved streamlined body shapes that are well-suited for moving through water. Their bodies are tapered at both ends, allowing water to flow smoothly around them. This streamlined shape helps to minimize drag and reduce water resistance, enabling fish to move more easily.

d) Sense of Smell: Fish have a highly developed sense of smell, which they use to navigate their environment and locate food sources. By relying on their sense of smell, fish can efficiently find their way through the water and locate prey without wasting unnecessary energy. This efficient navigation reduces the resistance they encounter during movement.

It's important to note that while these factors contribute to a reduction in water resistance during fish movement, other factors such as the fish's size, swimming speed, and the water's viscosity can also influence the overall resistance experienced by the fish. Additionally, different fish species may have specific adaptations that further enhance their ability to move through water with minimal resistance.

I hope this information helps! Let me know if you have any further questions.