True or false infiltration is the process by which solid ice can change directly into water vapor

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

What was the land like over 500 million years ago? what was under the sea?

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different