How does gel electrophoresis separate DNA fragments from each other?

What are the steps of how energy is transformed in plant cells?

20 points and brainlist 1. 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? 2. why does air pollution cause problems in developing nations more than in developed ones?

Genetic disorders can result when sister chromatids fail to seperate properly. during what phase is this problem most likely to occur?