Question

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

Answer 1

D. Mating only large horses (selective breeding) produces larger offspring, showing the trait is heritable and influenced by genes.