A scientist studies a species of bird in which the males and females are about same size The have plain colors bright What can conclude thes?

The scientist can conclude that the bird species is likely not sexually selected. Sexual selection is a process by which certain traits are selected for because they increase an individual's chances of mating. In many bird species, the males are more brightly colored than the females because this helps them to attract mates. However, in the bird species that the scientist is studying, the males and females are about the same size and have plain colors. This suggests that sexual selection is not a major factor in the evolution of this species.

There are a number of other factors that could be influencing the evolution of this bird species. For example, the birds' plain colors may help them to camouflage themselves from predators. Alternatively, the birds' small size may help them to avoid predators or to find food more easily. The scientist would need to conduct further studies to determine which factors are most important in the evolution of this bird species.