List two modern organisms that have pentameral symmetry

Pentameral symmetry is actually five-sided symmetry. This type of symmetry is found within the phylum Echinodermata.

One example of animal with pentameral symmetry is starfish which are similar in shape to a pentagram. Another example is sea urchin as an adult (its larvae has bilateral symmetry).

Pentameral symmetry is a type of radial symmetry – can be divided in several roughly identical pieces. Organisms with such a symmetry have no left or right sides, they have a top and a bottom surface, or a front and a back.

explanation:

the sun shines white and black light to our planet. the white light has all the colors in it. in our upper atmosphere, we have dust particles and oxygen molecules. the white light meaning all of the colors in a rainbow shines through the upper levels of the atmopshere and the blue light scatters across the entire planet. that is why our sky is blue.