Where did the following drugs originate from? 1 - painkiller aspirin 2 - penicillin antibiotic

If a set of instructions that determines all of the charactersitics of an organism is comparedto a book,and a chromosme is compared to chaper in the book,then what might be compared to a paragraph in the book?

The response is the basis for vaccination. primary secondary tertiary none of the above

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities