What causes a solar nebula to initially begin to form a solar system

After fertilization, which type of cellular division is responsible for the growth and development of a complex, multicellular organism?

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not