Can I use where instead of from which? I want to migrate this question to English Learner Site [closed]
Q 1. Can I use "where" instead of "from which"?
No.
Q 1-1. If it isn't possible, Why?
From is a preposition of motion or change that indicates an origin: "He came from England" "The heat created water from the ice"
Where is an adverb of place. = at, on, or in which place.
You can say: "... a stalk of spores grows out of the back of the ant's head, from where (or whence = from which) more spores can access more ants". Whence (and whither) are adverbs of motion and change.
NB whence and wither (and thence and thither, and hence and hither) are somewhat formal.