Which is an example of hybridization that would increase hybrid vigor?
a. producing a litter of puppies by mating two dogs of different breeds
b> using genetic engineering to insert a gene for vitamin a in carrot plants
c> pollinating the flowers on a tomato plant with pollen from a plant of the same variety
d

The embryos of a bird, a reptile, and a mammal are similar in appearance. how does comparing the physical appearance of embryos of different species support the theory of evolution? a. it shows that these organisms share a common ancestor. b. it provides evidence that these organisms eat the same foods.c. it shows that these organisms share the same habitat.d. it provides evidence that these organisms suffered a genetic mutation.