Question

Which example could be evidence for an organism's growth being influenced by the organism's genes?
A.
A horse species can be made larger by mating together only large horses.
B.
Sunflowers grown in the wild are smaller than sunflowers grown inside.
C.
A pig that eats more food will grow to be larger than a pig that eat less food.
D.
Specific grass species grow at different rates depending on the available water supply.

Answer 1

A. Mating only large horses and getting larger offspring shows size is heritable — evidence genes influence growth.