At concentrations of 0.1-1 g/mL. colchicine, a natural plant product, can cause the mitotic arrest of dividing cells at metaphase by disrupting the spindle apparatus. Colchicine interferes with which of these cell functions during cell division?

A microtubule organization of spindle fibers

B DNA synthesis of spindle protein

C membrane transport of spindle fibers

D RNA synthesis of spindle protein

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

20 the compound al(nh3)2 has atoms of nitrogen.

Wich level of organization includes all the other levels or organizations