Birds and butterflies are very anatomically different, so even if their wings perform the same function, they probably evolved separately. This is called convergent evolution. The bat would be another example that fits in this category in regards to flying.
The speed of a sound wave increase as it moves into deep water because sound waves travel faster as salinity decreases, and salinity decreases with depth.
Explanation:
Salinity, Temperature and pressure affect the speed of sound travels in ocean. At a depth of 1000 m in mid latitudes the sound is minimum. Sun makes ocean warm and the temperature become increase in their surface so sound speed becomes fast.
The wave amplitude is related to its carried energy. The wave who amplitude is high carries huge amount of energy and same low amount of amplitude wave carries low amount of energy.
Answer: Brain ( more specifically the hypothalamus region of the brain)
Hope this helps :D
I DONT HAVE THE ANSWER BUT GOOD LUCK
Infrared: (of electromagnetic radiation) having a wavelength just greater than that of the red end of the visible light spectrum but less than that of microwaves.Infrared radiation has a wavelength from about 800 nm to 1 mm, and is emitted particularly by heated objects.
Ultraviolet: (of electromagnetic radiation) having a wavelength shorter than that <span>of the violet end of the visible spectrum but longer than that of X-rays.</span>