Sea floor spreading creates new sea floor, but the diameter of the earth doesn't increase because another process melts old sea floor back into magma. What is the name of this process?

A family that has no elements found in the earths crust

Which of the following is true? Water is important to some organisms. Some substances must be dissolved in water before they can be used. All organisms obtain water through food. Plant cells are unaffected when water is scarce.

The connection between two or more bones of the skeleton is a (n) :

The variation associated with meiosis is the result of select one: a. crossing over b. chromosome condensation in prophase i c. b and c d. fertilization e. random chromosome arrangement at metaphase i

What kind of animals have roundworms?

In this food chain energy moves from one living thing to another. What source of energy starts this food chain?

1) Research the history of terrariums. Find out who developed the first terrarium. What did this particular scientist want to study? 2) What are the two different types of terrariums?

Lab report mouse genetics one trait

How do scientist develop scientific explanations about subjects that are impossible to study through controlled experiments?

Is Bacteria and Bcaterium is same ...