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.

sand 60

clay 10

silt 30

sandy loam should be dominated by the sand. as the amount of sand increased, the amount of slit needed to anchor the plants' roots to the sand will also be increased. even though the amount is very little, 10% part of clay is still necessary for proper oxidation.

c

explanation: