A medical consequence for six-month-old babies that have only been bottle-fed with formula milk and not breastfed is that: (A) they will not develop microflora - HSC - SSCE Biology - Question 19 - 2015 - Paper 1

Breastfeeding provides numerous health benefits that formula feeding alone cannot replicate. One significant consequence of not breastfeeding is the increased risk of infectious diseases in infants. Breast milk contains antibodies and other immunological factors that help protect the baby from infections. Therefore, without these elements from breast milk, babies who are exclusively formula-fed may face a higher susceptibility to various infectious diseases, particularly during the critical early months of life.