Answer:
It was formed around 4.5 billion years ago when something the size of mars smashed into the Earth, which made matter fly into orbit.
Answer:
Cleavage is a process in which cell is divided into several parts without increasing in size. There are 4 stages of cleavage i. e. 2-cell, 4-cell, 8-cell and 16 cell stages. 2 cell embryo cleavage occurs after 30 hours of fertilization. 4 cell embryo cleavage occurs after 48 hours. 6 cell embryo cleavage occurs on third day of fertilization. 8 cell embryo cleavage occurs on fourth day of fertilization and more than 100 cells are formed.
By the unequal heating of earths surface
Osmosis. This<span> is the procedure in which water absorption through semi permeable membranes happens at high concentration levels. Semi permeable membranes pertain to tissues found in the plant roots; from there, water will be transported to an area with much lower concentration levels</span>
