If the birds only like to eat blue berries in an environment with blue and red berries, the birds are putting selection pressure for more plants to have red berries.
Selection pressures are factors that act to boost or limit the organism's capacity to thrive in an environment. It could be biotic or abiotic.
- The availability of purple berries in the environment is dependent on the mixing of both blue and red berry alleles.
- If birds keep picking on the blue berries, it means fewer blue berries would be available to mix with red berries in order to produce purple berries.
- Hence, fewer blue and purple berries would be available in the environment with time leaving only red berries to thrive.
In other words, the continuous picking on blue berries by birds will only increase the availability of red berries with time.
More on selection pressure can be found here: https://brainly.com/question/7091258
