An unrooted tree with three species (a, b, and c. is shown. if we added a new species, d, anywhere in the phylogeny, we could find different unrooted species trees. suppose that you find another species, e, that might belong to any branch of the four-species tree. by adding species e anywhere in the phylogeny, we could find different unrooted species trees with the five species.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave