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radially symmetrical , asymmetrical , bilaterally symmetrical?

2007-02-15 12:49:18 · 3 answers · asked by Anonymous in Science & Mathematics Biology

3 answers

I guess the two above individuals missed your question. The answer is bilateral symmetry. They have an anterior, posterior, dorsla and ventral surface and a right and left side.

2007-02-19 12:26:03 · answer #1 · answered by ATP-Man 7 · 0 0

Annelids have bodies that are divided into segments. Annelids have very well-developed internal organs.

Some may have long bristles. Others have shorter bristles and seem smooth, like the earthworm shown here.

There are about 9,000 species of Annelids known today, including worms and leeches.


Annelida is a group commonly referred to as segmented worms, and they are found worldwide from the deepest marine sediments to the soils in our city parks and yards. Through most of the 20th century Annelida was split into three major groups; Polychaeta, Oligochaeta (earthworms etc.) and Hirudinea (leeches). Earthworms and leeches are the familiar annelids for most people, but polychaetes comprise the bulk of the diversity of Annelida and are found in nearly every marine habitat, from intertidal algal mats downwards. There are even pelagic polychaetes that swim or drift, preying on other plankton, and a few groups occurring in fresh water and moist terrestrial surroundings. Around 9000 species of polychaetes are currently recognized with several thousand more names in synonymy, and the overall systematics of the group remains unstable

2007-02-15 12:55:47 · answer #2 · answered by Lynnrose2 3 · 0 1

A class of worms in which the surface of the body exhibits a more or less distinct division into rings or segments, generally provided with appendages for locomotion and with gills. It includes the ordinary marine worms, the earth-worms, and the leeches.

kind regards

2007-02-15 12:53:35 · answer #3 · answered by Hany Exe 1 · 0 2

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