What enzyme found in the digestive system breaks chemical bonds between the sugar polymers in lactose?

Which part of the cell is affected by the movement of molecules through diffusion, osmosis and active transport?

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

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.