Top 10 Foods Highest in Calories Written by Daisy Whitbread, MScN Calories are the basic unit of energy found in all foods and are necessary to maintain the body's vital functions or basal metabolic rate. The amount of calories a person needs depends on factors like their age, gender, and lean muscle mass.
Earthworms may appear to have radial symmetry because of their cylindrical shape, but DON'T BE FOOLED! They actually have BILATERAL symmetry. This is because they have an up and down (dorsal and ventral), and front and back (andterior and posterior).Linus Â· 9 years ago.Thumbs up.arthworms may appear to have radial symmetry because of their cylindrical shape, but DON'T BE FOOLED! They actually have BILATERAL symmetry. This is because they have an up and down (dorsal and ventral), and front and back (andterior and posterior). Linus Â· 9 years ago. Thumbs up.
The bodies of most oligochaetes (earthworms) are divided externally and internally into well-defined segments. Internally, these segments are divided by membranous partitions. Except for the most anterior and posterior segments, all segments are essentially alike. Earthworms burrow through the soil, feeding on decaying leaves and animal debris. As earthworms move through the soil, they both enrich and loosen the soil. It is for this reason that earthworms are valued by gardeners. An acre of good garden soil may contain as many as 50,000 individuals. External Anatomy and Locomotion of the living earthworm Observe the external features of the earthworm. Notice that the body is made up of a number of segments.