Do I really need to know and understand my prerequisites ?

Hey! So I’m a sophomore in college. I’m a Biological Sciences major on a RN track. )My plan is to get my 4-year degree in Biological Sciences and then go 2 years to get my RN license). Right now I’m taking my beginning BIOL, MATH 1550, and beginning CHEM. Whenever I’m doing an assignment last minute, I google it just so I can have it done and completed to get the grade. Is that a bad thing? Will the stuff I’m learning now affect me in the future. Should I I try to remember this for the long term and not take the easy way all the time?