In gel electrophoresis why does the DNA move toward the bottom of the wall of gel? A. DNA is negatively charged. B. DNA is positively charged. C. DNA is extremely heavy. D. DNA is less dense than air.

When a scientist is conducting research about all the plants and wildelife in the mojave desert as well as the deserts resources, such as water and soil the scientist is studying A: A community B: A population C: A species D: An ecosystem

Why are earths materials and energy considered to be in equilibrium -earths materials are recycled and reused constantly -earths materials are all divided in equal amounts -energy is balanced and cannot be created or destroyed -energy is always

n a certain plant, blue (B) flower color is dominant to white (b). You have a blue flowered plant and a white flowered plant. What do you know about the genotype and phenotype of each plant? Now you cross the plants and all the offspring are blue.

A body part that must resist unpredictable stress from multiple directions would likely be composed of which tissue

What is a pathogen free environment

After recording the damage encountered in a load, what should be done with the damaged cases?

Radioactive decay occurs when atoms: A. lose mass B. join with atoms of another element C. break down the form atoms of another element D. are exposed to another element

In the digestive system what part of the body precedes the small intestine?

The difference between mitosis and meiosis

The chemical basis of blood group specificity resides in the carbohydrates displayed on the surface of red blood cells. Carbohydrates have the potential for great structural diversity.