Low concentration to high concentration and requires energy
Because each branch has an importance and specialty
The answer is d. Synapomorphy
An object from space burning up as it enters the atmosphere of a planet: Meteor
A small body in space, usually composed of rock or metal: Asteroid
An object from space that falls to the surface of a planet without completely burning up: Meteorite
A body made mostly of ice and dust that leaves a trail of dust known as a tail as it approaches the Sun: Comet
