False because t<span>he </span>Cambrian Period<span> was when most of the major groups of animals first appear in the fossil record.</span>
The main three theories are that - all organisms are composed of cells- the cell is the basic unit of structure and organization in organisms- All cells come from pre-existing cells
Answer:
greenhouse gases produce or a heat from the sun bringing about global warming
It beause:
1) its self pollinating and
2) its characteristics are easily seen
