Homologous chromosomes pair up during prophase I to form a . Fill it in PL

i will give brainlist

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.