What are my chances of receiving merit & other advice needed!

And one more suggestion, my son’s school, one that will give you a nurturing, yet intellectually exciting experience: The Honors Tutorial at Ohio University. And, by the way, the campus is gorgeous and the school is known for having some of the friendliest students in the nation. Take a moment to check out the campus:
https://www.youtube.com/watch?v=otFKWsg0r-o

and the HTC: https://www.ohio.edu/honors/ (that’s my son on top of Mt. Kilimanjaro -Uhuru Peak)
and https://www.youtube.com/watch?v=ScM27YglA2s

and HTC Biology: https://www.ohio.edu/honors/future-students/programs/biological-sciences.cfm
(fulfills requirements for grad study in veterinary medicine)