What is common and different in the external structure of crabs and crayfish?
| December 14, 2020 | education
1) The body is segmented.
2) The body is divided into 3 sections (head, chest, abdomen).
3) The head merges with the chest segments.
4) Covered with a thyroid integument.
5) 2 pairs of antennas.
6) 3 pairs of chewing limbs.
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