The inheritance of acquired characteristic was a theory of evolutionary change proposed by?

Question

two closely related species of squirrels are observed to occupy habitats at diferent , non overlapping elevations. this keeps the squirrls from hybridizing and would be an example of?

Answer 1

Question 1 is Lamarck.

Question 2:  Since they are different species and in separate physical areas, I believe the answer is a type of Pre-zygotic Reproductive Isolation Mechanism called Habitat (or sometimes Spatial) Isolation.

Answer 2

1) Lamarck

2) Sympatric speciation.

Look up Lamarck, and "speciation", in Wikipedia for more information that I think you will find interesting.