I think the correct answer from the choices listed above is option B. A modification of the leaves into the spine in a cactus plant can be seen The spines are modified leaves. It helps defend the plant and also reduce the surface area which helps limit loss of water.
B. half of the boys are normal and half of the boys are color-blind. ( boys are most likely to get color blond than girls, the girls can also be carrier like the mother)
