The Sun and the planets formed together, 4.6 billion years ago, from a cloud of gas and dust called the solar nebula. A shock wave from a nearby supernova explosion probably initiated the collapse of the solar nebula. The Sun formed in the center, and the planets formed in a thin disk orbiting around it
Nutrients cross the membrane wall with the help of protein channels.
Answer:
Savanna do not exist in the united states because there are no true tropic climates.
False in lunar eclipse the shadow is cast on the sun