list one key similarity and one key difference between a vaccine and the pathogen it protects against

a lot of people sadly don't know the best way to learn is cheating off of your friends or this amazing thing called google

above statement is not a true statement about the open ocean because the open ocean has low levels of nutrients. most of the photosynthetic activity on earth occurs in the open ocean within the photic zone. organisms in the deep ocean are exposed to frigid temperatures and total darkness but it does not begin at the low-tide mark.

it is a. i hope this .