How does mudstone turn into metamorphic rock?
a. after a short period of time, particles of rock dissolve and harden again.
b. after many years, groundwater discolors and changes the rock.
c. over a long period of time, temperature and pressure build up and change the rock.
d. over time, layers form and spread out over a wide area to form rock.

Always use significant figure rules. remember that these rules apply to all numbers that are measurements. a car travels 6 miles north, 3 miles east, and then 2 miles south. what is the distance traveled? a.7 b.11

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

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