Which of these is a recessive genetic disorder?
a. down syndrome
c. type o blood
b. type ab blood
d. cystic fibrosis

How do antiviral drugs work? in your own words.

The cluster of developing cells from conception until birth is called an

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