What are some types of selective breeding that aren't dogs?

cows that produce lots of milk.

chickens that produce large eggs.

wheat plants that produce lots of grain.

Explanation:

I think

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link: