1. List three basic categories into which galaxies are classified. Describe each category 2. Explain how our perspective, looking at the galaxies from Earth, affects the classification of these galaxies.

3. Observe the background stars in the Galaxies tab. Are the background images accurate, showing actual stars and actual arrangements of stars, or are included to just give you a sense of other stars and galaxies in the background?

this website is for anybody really not just for girls just saying, also while a lot of males are mean and you know there are the few who are kind and then there's the nice-guys but then theirs also guys like me who are shy we don't get out much because there are people like you who exist who would most likely punch a guy in the face so next time just think about things before you post them to a website where guys and girls can see your question.

answer; i believe its echoic memory,it is believed to last three to four seconds; good luck

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: