Why do some DNA fragments move farther than others during gel electrophoresis?

A.

Because their shapes are different

B.

Because they are different types of molecules

C.

Because the samples are different colors

D.

Because their masses are different

2. London has suffered from terrible air pollution for at least seven centuries. Why is the city so prone to its famous "London fog?" What did London do to get rid of its air pollution?

What are the effects of fertilizer input into lakes?

How does a virus differ from a living cell?

Interneurons A) are found only in the central nervous system. B) carry only sensory impulses. C) carry only motor impulses. D) only connect motor neurons to other motor neurons. E) are found between neurons and their effectors.

If an organism is unicellular, a eukaryote, and autotrophic, into which domain would it be classified?

Select the correct answer. How is a conductor different from an insulator? A. The free movement of electrons within a conductor permits the transfer of charge. B. The free movement of protons within a conductor permits the transfer of charge. C.

Compare the hibiscus and spider lily pollen grain structure

Which macromolecule is responsible for catalyzing biochemical reactions?

The crystals of a mineral are always the same size.

Suppose two suspects in a crime have dna profiles that match the one dna fragment tested what should happen next