Question

what are heritable variations?
variations that cannot be passed along to offspring
learned behaviors that are taught directly to offspring
environmental changes that have no effect on living organisms
variations that can be inherited and passed on

Explanation:

Heritable variations are genetic differences that can be passed from one generation to the next. These are the variations that contribute to evolution as they are inherited. Options 1 (variations that cannot be passed along to offspring) and 3 (environmental changes that have no effect on living organisms) are incorrect as heritable variations are passed on and can affect organisms. Option 2 (learned behaviors that are taught directly to offspring) refers to non - genetic, learned traits which are not heritable variations in the biological sense.

Answer:

variations that can be inherited and passed on