Could a small change in gravity effect the evolution of animals?

Question

How would it effect them?
Open your minds,please.

Answer 1

Basic skeletal design is genetically determined and since modern evolutionary theory states that acquired traits are not inherited, the loss of bone mass experienced by an individual exposed to low gravity would not be transmitted to its offspring. However, if it is beneficial for animals to have the lowest possible bone mass, then evolution in reduced gravity should favor those species with a genetic tendency toward lightweight skeletons: animals with low bone mass would have a competitive edge over animals equipped with more massive skeletons. Additionally, because such animals would devote relatively less body mass to the skeleton, they should be able to grow much larger than animals with heavier skeletons and there should be an increase in the size of the very largest land animals. Because of its magnified effect on large animals, a 20% reduction in gravity would, in effect, foster the evolution of giants – animals with the skeleton of an elephant but the mass of a whale.

Answer 2

I suppose it's possible, but it would have to influence some kind of selective pressure on the animals in question.

Answer 3

It would provided that the gravitational change created some kind of selective pressure.

Answer 4

Any change to the environment affects a species. So, yes.