Resemblances between swifts and swallows are due to convergent evolution, reflecting similar life styles based on catching insects in flight. The family name, Apodidae, is derived from the Greek á¼ÏÎ¿ÏÏ (Ã¡pous), meaning footless, a reference to the small, weak legs of these most aerial of birds.
Does Saturn have an atmosphere and what does it consist? The planet Saturn does have an atmosphere, and indeed, it consists mostly of atmosphere. The main chemical constituents of the atmosphere of Saturn are methane, ammonia, and hâ¦ydrogen. 5 people found this useful.
This implies that much of the planet's helium is sinking through the hydrogen. The distance to Saturn from the sun keeps these gases, and the temperature of the planet, cold. Traces of water are present in the atmosphere, but predominantly as ice. The surface of Saturn is defined by the region where the pressure of the planet reaches one bar, equivalent to the pressure at sea level on Earth. Climate and weather. Like Jupiter, Saturn boasts layers of clouds.