Since climate determines the types of vegetation that can grow in a particular area, each biome may be defined by particular types of plants.
a. true
b. false

That statement is true

There are specific plants that can only live in a specific biome.

For example, a cactus can only lived in desert biome and you won't find any of it in aquatic biomes

hope this helps

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it